Minecraft version

1.21.1

Farmer's Delight version

2.2.8

Fabric Loader version

0.16.9

Fabric API version

0.114.0+1.21.1

Description

When upgrading our server to 1.21.1 from 1.20.1, all items stack counts, enchantments, and shulker contents have been erased from Cabinets in the world. Both for every compat cabinets and built-in farmer's delight cabinets.

Steps to reproduce

1. Run a fabric server with Farmer's Delight Refabricated in version 1.20.1
2. Place a cabinet with items in it that contain enchantments/shulkers with items/items with a stack count above 1
3. Update the server and mods to version 1.21.1
4. Rejoin and the item data is lost

Mod list

• almanac 1.0.2
• another_furniture 4.0.0
• anvil-too-expensive 1.3.1
• appleskin 3.0.6+mc1.21
• architectury 13.0.8
• armor-stand-editor 2.5.1+1.21.1
  |-- common-protection-api 1.0.0
  |-- fabric-permissions-api-v0 0.3.1
  |-- player-data-api 0.6.0+1.21
  |-- server_translations_api 2.3.1+1.21-pre2
  -- sgui 1.6.1+1.21.1
• artifacts 12.0.6
  |-- com_electronwill_night-config_core 3.8.0
  |-- com_electronwill_night-config_toml 3.8.0
  -- expandability 12.0.0
• balm-fabric 21.0.22
  -- kuma_api 21.0.5-SNAPSHOT
• banhammer 0.11.1+1.21
  |-- com_mysql_mysql-connector-j 8.4.0
  |-- fabric-permissions-api-v0 0.3.1
  |-- org_postgresql_postgresql 42.7.3
  -- org_xerial_sqlite-jdbc 3.46.0.0
• beekeeperhut 2.0.1
• betterdeserttemples 1.21.1-Fabric-4.1.2
  -- org_reflections_reflections 0.10.2
• betterdungeons 1.21.1-Fabric-5.1.4
  -- org_reflections_reflections 0.10.2
• betterfortresses 1.21.1-Fabric-3.1.3
  -- org_reflections_reflections 0.10.2
• betterjungletemples 1.21.1-Fabric-3.1.2
  -- org_reflections_reflections 0.10.2
• bettermineshafts 1.21.1-Fabric-5.1.1
  -- org_reflections_reflections 0.10.2
• betteroceanmonuments 1.21.1-Fabric-4.1.2
  -- org_reflections_reflections 0.10.2
• betterstrongholds 1.21.1-Fabric-5.1.2
  -- org_reflections_reflections 0.10.2
• betterwitchhuts 1.21.1-Fabric-4.1.1
  -- org_reflections_reflections 0.10.2
• bookshelf 21.1.28
• bushierflowers 0.0.3-1.21
• cardinal-components 6.1.1
  |-- cardinal-components-base 6.1.1
  |-- cardinal-components-block 6.1.1
  |-- cardinal-components-chunk 6.1.1
  |-- cardinal-components-entity 6.1.1
  |-- cardinal-components-item 6.1.1
  |-- cardinal-components-level 6.1.1
  |-- cardinal-components-scoreboard 6.1.1
  -- cardinal-components-world 6.1.1
• chat-control 1.6.2
  |-- fabric-permissions-api-v0 0.3.1
  -- server_translations_api 2.3.1+1.21-pre2
• chisel 1.8.2
• chunksending 1.21-2.8
• chunky 1.4.16
• cicada 0.10.2+1.21-1.21.1
• cinderscapes 5.0.2
  |-- biolith 3.0.0
  |-- cinderscapes-client 5.0.2
  |-- cinderscapes-common 5.0.2
  |-- cinderscapes-worldgen 5.0.2
  |-- terraform-biome-remapper-api-v1 11.0.0
  |-- terraform-shapes-api-v1 11.0.0
  |-- terraform-surfaces-api-v1 11.0.0
  -- terraform-wood-api-v1 11.0.0
• cloth-config 15.0.140
  -- cloth-basic-math 0.6.1
• clumps 19.0.0.1
• cobblecast 2.0.1
• cobblemon 1.6.0+1.21.1
• cobblemonextras 1.4.0
• cobblemonridingfabric 1.3.2
• cobblepedia 0.7.0-SNAPSHOT
• cobbleutils 1.1.3
• collective 7.87
• commonnetworking 1.0.16-1.21.1
• connected-doors 1.3+1.21
• copperhopper 0.10.0+1.21.1
• craftingstore 1.21.1
• cristellib 1.2.8
  -- blue_endless_jankson 1.2.3
• cupboard 1.21-2.7
• darkpaintings 21.1.2
• dexrewards 1.0
  |-- fabric-permissions-api-v0 0.3.1
  |-- net_kyori_adventure-text-minimessage 4.17.0
  -- sgui 1.6.1+1.21.1
• eessentials 2.2.0
  -- net_kyori_adventure-text-minimessage 4.17.0
• elytra_trinket 1.0.9
• emotecraft 2.4.6
  |-- bendy-lib 5.1
  -- playeranimator 2.0.0+1.21.1
• ends_delight refabricated-1.21.1-2.5
• everycomp 1.21-2.8.3
• explorify 1.6.2
• fabric-api 0.114.0+1.21.1
  |-- fabric-api-base 0.4.42+6573ed8c19
  |-- fabric-api-lookup-api-v1 1.6.70+b559734419
  |-- fabric-biome-api-v1 13.0.31+d527f9fd19
  |-- fabric-block-api-v1 1.0.22+0af3f5a719
  |-- fabric-block-view-api-v2 1.0.10+6573ed8c19
  |-- fabric-blockrenderlayer-v1 1.1.52+0af3f5a719
  |-- fabric-client-tags-api-v1 1.1.15+6573ed8c19
  |-- fabric-command-api-v1 1.2.49+f71b366f19
  |-- fabric-command-api-v2 2.2.28+6ced4dd919
  |-- fabric-commands-v0 0.2.66+df3654b319
  |-- fabric-content-registries-v0 8.0.18+b559734419
  |-- fabric-convention-tags-v1 2.1.2+7f945d5b19
  |-- fabric-convention-tags-v2 2.9.2+e60e56d419
  |-- fabric-crash-report-info-v1 0.2.29+0af3f5a719
  |-- fabric-data-attachment-api-v1 1.4.0+da19b51a19
  |-- fabric-data-generation-api-v1 20.2.25+16c4ae2519
  |-- fabric-dimensions-v1 4.0.0+6fc22b9919
  |-- fabric-entity-events-v1 1.7.0+2122d82819
  |-- fabric-events-interaction-v0 0.7.13+ba9dae0619
  |-- fabric-game-rule-api-v1 1.0.53+6ced4dd919
  |-- fabric-item-api-v1 11.1.1+d5debaed19
  |-- fabric-item-group-api-v1 4.1.6+6823f7cd19
  |-- fabric-key-binding-api-v1 1.0.47+0af3f5a719
  |-- fabric-keybindings-v0 0.2.45+df3654b319
  |-- fabric-lifecycle-events-v1 2.5.0+01d9a51c19
  |-- fabric-loot-api-v2 3.0.15+3f89f5a519
  |-- fabric-loot-api-v3 1.0.3+3f89f5a519
  |-- fabric-message-api-v1 6.0.13+6573ed8c19
  |-- fabric-model-loading-api-v1 2.0.0+fe474d6b19
  |-- fabric-networking-api-v1 4.3.0+c7469b2119
  |-- fabric-object-builder-api-v1 15.2.1+40875a9319
  |-- fabric-particles-v1 4.0.2+6573ed8c19
  |-- fabric-recipe-api-v1 5.0.14+248df81c19
  |-- fabric-registry-sync-v0 5.2.0+34f5d91419
  |-- fabric-renderer-api-v1 3.4.0+c705a49c19
  |-- fabric-renderer-indigo 1.7.0+c705a49c19
  |-- fabric-renderer-registries-v1 3.2.68+df3654b319
  |-- fabric-rendering-data-attachment-v1 0.3.48+73761d2e19
  |-- fabric-rendering-fluids-v1 3.1.6+1daea21519
  |-- fabric-rendering-v0 1.1.71+df3654b319
  |-- fabric-rendering-v1 5.0.5+df16efd019
  |-- fabric-resource-conditions-api-v1 4.3.0+8dc279b119
  |-- fabric-resource-loader-v0 1.3.1+5b5275af19
  |-- fabric-screen-api-v1 2.0.25+8b68f1c719
  |-- fabric-screen-handler-api-v1 1.3.88+b559734419
  |-- fabric-sound-api-v1 1.0.23+6573ed8c19
  |-- fabric-transfer-api-v1 5.4.2+c24bd99419
  -- fabric-transitive-access-wideners-v1 6.2.0+45b9699719
• fabric-language-kotlin 1.13.0+kotlin.2.1.0
  |-- org_jetbrains_kotlin_kotlin-reflect 2.1.0
  |-- org_jetbrains_kotlin_kotlin-stdlib 2.1.0
  |-- org_jetbrains_kotlin_kotlin-stdlib-jdk7 2.1.0
  |-- org_jetbrains_kotlin_kotlin-stdlib-jdk8 2.1.0
  |-- org_jetbrains_kotlinx_atomicfu-jvm 0.26.1
  |-- org_jetbrains_kotlinx_kotlinx-coroutines-core-jvm 1.9.0
  |-- org_jetbrains_kotlinx_kotlinx-coroutines-jdk8 1.9.0
  |-- org_jetbrains_kotlinx_kotlinx-datetime-jvm 0.6.1
  |-- org_jetbrains_kotlinx_kotlinx-io-bytestring-jvm 0.6.0
  |-- org_jetbrains_kotlinx_kotlinx-io-core-jvm 0.6.0
  |-- org_jetbrains_kotlinx_kotlinx-serialization-cbor-jvm 1.7.3
  |-- org_jetbrains_kotlinx_kotlinx-serialization-core-jvm 1.7.3
  -- org_jetbrains_kotlinx_kotlinx-serialization-json-jvm 1.7.3
• fabricloader 0.16.9
• farmersdelight 1.21.1-2.2.8+refabricated
  |-- mm 2.3
  |-- porting_lib_base 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- com_electronwill_night-config_core 3.8.0
  | |-- com_electronwill_night-config_toml 3.8.0
  | |-- mixinextras 0.5.0-beta.3
  | |-- mm 2.3
  | |-- porting_lib_accessors 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- porting_lib_asm 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- porting_lib_attributes 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- porting_lib_blocks 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- porting_lib_common 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- porting_lib_core 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- porting_lib_entity 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- porting_lib_extensions 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- porting_lib_fluids 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- porting_lib_gametest 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- porting_lib_gui_utils 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- porting_lib_level_events 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- porting_lib_mixin_extensions 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- porting_lib_tags 3.0
  | -- porting_lib_transfer 3.1.0-beta.47.hotfix.2+1.21.1
  |-- porting_lib_config 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- com_electronwill_night-config_core 3.8.0
  | |-- com_electronwill_night-config_toml 3.8.0
  | |-- mixinextras 0.5.0-beta.3
  | |-- porting_lib_core 3.1.0-beta.47.hotfix.2+1.21.1
  | -- porting_lib_gametest 3.1.0-beta.47.hotfix.2+1.21.1
  |-- porting_lib_item_abilities 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- mixinextras 0.5.0-beta.3
  | |-- porting_lib_blocks 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- porting_lib_core 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- porting_lib_gametest 3.1.0-beta.47.hotfix.2+1.21.1
  | -- porting_lib_level_events 3.1.0-beta.47.hotfix.2+1.21.1
  |-- porting_lib_lazy_registration 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- mixinextras 0.5.0-beta.3
  | |-- porting_lib_core 3.1.0-beta.47.hotfix.2+1.21.1
  | -- porting_lib_gametest 3.1.0-beta.47.hotfix.2+1.21.1
  |-- porting_lib_loot 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- mixinextras 0.5.0-beta.3
  | |-- porting_lib_conditions 3.1.0-beta.47.hotfix.2+1.21.1
  | |-- porting_lib_core 3.1.0-beta.47.hotfix.2+1.21.1
  | -- porting_lib_gametest 3.1.0-beta.47.hotfix.2+1.21.1
  -- porting_lib_recipe_book_categories 3.1.0-beta.47.hotfix.2+1.21.1
  |-- mixinextras 0.5.0-beta.3
  |-- porting_lib_core 3.1.0-beta.47.hotfix.2+1.21.1
  -- porting_lib_gametest 3.1.0-beta.47.hotfix.2+1.21.1
• faster-random 5.1.0
• ferritecore 7.0.2-hotfix
• filament 0.10.4+1.21.1
  |-- bil 1.1.13+1.21
  |-- fabric-permissions-api-v0 0.3.1
  -- net_kyori_adventure-text-serializer-legacy 4.17.0
• flan 1.21.1-1.10.10
  -- rtree-3i-lite-fabric 0.3.0
• flowerymooblooms 2.0.2
• forgeconfigapiport 21.1.3
  |-- com_electronwill_night-config_core 3.8.0
  -- com_electronwill_night-config_toml 3.8.0
• friendsandfoes 3.0.6
• geckolib 4.7.3
• getittogetherdrops fabric-1.21-1.3.1
• gooeylibs 3.1.0
  -- gooeylibs-api 3.1.0
• gpumemleakfix 1.21-1.8
• gts 2.4.0
• headindex 1.1.7
  |-- common-economy-api 1.1.1
  |-- fabric-permissions-api-v0 0.3.1
  -- server_translations_api 2.3.1+1.21-pre2
• iceberg 1.2.7
• impactor 5.3.0+1.21.1
  |-- impactor-command-api 5.3.0.1+1.21.1
  | -- cloud 2.0.0-beta.9
  | |-- fabric-permissions-api-v0 0.3.1
  | |-- io_leangen_geantyref_geantyref 1.3.15
  | |-- org_incendo_cloud-brigadier 2.0.0-beta.9
  | |-- org_incendo_cloud-core 2.0.0
  | |-- org_incendo_cloud-minecraft-modded-common-fabric-repack_ 2.0.0-beta.9
  | -- org_incendo_cloud-services 2.0.0
  |-- net_kyori_adventure-api 4.17.0
  |-- net_kyori_adventure-key 4.17.0
  |-- net_kyori_adventure-nbt 4.17.0
  |-- net_kyori_adventure-text-logger-slf4j 4.17.0
  |-- net_kyori_adventure-text-minimessage 4.17.0
  |-- net_kyori_adventure-text-serializer-gson 4.17.0
  |-- net_kyori_adventure-text-serializer-json 4.17.0
  |-- net_kyori_adventure-text-serializer-legacy 4.17.0
  |-- net_kyori_adventure-text-serializer-plain 4.17.0
  |-- net_kyori_event-api 5.0.0-SNAPSHOT
  |-- net_kyori_examination-api 1.3.0
  |-- net_kyori_examination-string 1.3.0
  |-- org_incendo_cloud-annotations 2.0.0
  |-- org_incendo_cloud-minecraft-extras 2.0.0-beta.10
  |-- org_incendo_cloud-processors-common 1.0.0-rc.1
  -- org_incendo_cloud-processors-confirmation 1.0.0-rc.1
• invview 1.4.15-1.20.5+
• itemcommander 1.7.0-pre.2+1.21.1
• jade 15.8.3+fabric
• jadeaddons 6.0.3+fabric
• jamlib 1.2.2-build.2+1.21.1
  -- blue_endless_jankson 1.2.3
• java 21
• jei 19.8.4.113
• jmc 1.19.2
• justenoughbreeding 1.5.0
• justenoughprofessions 4.0.3
• kiwi 15.1.1+fabric
• konkrete 1.9.9
• ledger 1.3.5
  |-- fabric-permissions-api-v0 0.3.1
  -- server_translations_api 2.3.1+1.21-pre2
• letmedespawn 1.4.4
• lithium 0.14.3-snapshot+mc1.21.1-build.92
• lootr 1.21-1.10.34.86
• luckperms 5.4.140
  -- fabric-permissions-api-v0 0.3.1
• luckperms-placeholders 5.4-SNAPSHOT
• melius-vanish 1.5.9+1.21.1
  |-- fabric-permissions-api-v0 0.3.1
  |-- player-data-api 0.6.0+1.21
  -- server_translations_api 2.3.1+1.21-pre2
• mes 1.3.5-1.21-fabric
• minecraft 1.21.1
• minimotd-fabric 2.1.3
• mobfilter 0.11.1+1.21.1
  -- org_yaml_snakeyaml 2.1
• moonlight 1.21-2.17.12
• nametag 0.2.3
  -- predicate-api 0.5.1+1.21
• natures_spirit 2.0.1-1.21.1
• naturescompass 1.21.1-2.2.7-fabric
• neoclear 1.2.0
  -- neoapi 2.0.1
• neoplushies 1.5.2
• neospawnpoints 1.2.1
• neospecs 1.1.2
• nochatreports 1.21.1-v2.9.1
• nullscape 1.2.10
• oceansdelight fdrf-fabric-1.0.2-1.21
• orderedplayerlist 0.1.4+1.21
  -- fabric-permissions-api-v0 0.3.1
• owo 0.12.15+1.21
  |-- io_wispforest_endec 0.1.5
  |-- io_wispforest_endec_gson 0.1.3
  |-- io_wispforest_endec_jankson 0.1.3
  -- io_wispforest_endec_netty 0.1.2
• packedup 1.0.30+c
• packetfixer 1.4.2
• palmon 1.1.0
• patchouli 1.21-87-FABRIC
  -- fiber 0.23.0-2
• paxi 1.21.1-Fabric-5.1.2
  -- org_reflections_reflections 0.10.2
• pebbles-crates 1.1.0-1.21.1
  |-- adventure-platform-fabric 5.14.2
  | |-- net_kyori_adventure-api 4.17.0
  | |-- net_kyori_adventure-key 4.17.0
  | |-- net_kyori_adventure-platform-api 4.3.3
  | |-- net_kyori_adventure-text-logger-slf4j 4.17.0
  | |-- net_kyori_adventure-text-minimessage 4.17.0
  | |-- net_kyori_adventure-text-serializer-ansi 4.17.0
  | |-- net_kyori_adventure-text-serializer-gson 4.17.0
  | |-- net_kyori_adventure-text-serializer-json 4.17.0
  | |-- net_kyori_adventure-text-serializer-plain 4.17.0
  | |-- net_kyori_ansi 1.1.0
  | |-- net_kyori_examination-api 1.3.0
  | |-- net_kyori_examination-string 1.3.0
  | -- net_kyori_option 1.0.0
  -- net_kyori_adventure-text-serializer-legacy 4.17.0
• pebbles-shop 1.3.0-1.21.1
  |-- net_kyori_adventure-api 4.17.0
  |-- net_kyori_adventure-text-minimessage 4.17.0
  -- net_kyori_adventure-text-serializer-gson 4.17.0
• placeholder-api 2.4.1+1.21
• pokeparticles 1.1.1
  -- com_github_kuramastone_butilities-core 1.1.1
• pokeskins 1.5.0
  -- selfdotmodlibs 7.1.1-1.21.1
• polydex 1.2.4+1.21.1
  |-- player-data-api 0.6.0+1.21
  |-- predicate-api 0.5.1+1.21
  |-- server_translations_api 2.3.1+1.21-pre2
  -- sidebar-api 0.5.0+1.21
• polymer-bundled 0.9.18+1.21.1
  |-- polymer-autohost 0.9.18+1.21.1
  | -- io_netty_netty-codec-http 4.1.82
  |-- polymer-blocks 0.9.18+1.21.1
  |-- polymer-common 0.9.18+1.21.1
  | -- packet_tweaker 0.5.5+1.21
  |-- polymer-core 0.9.18+1.21.1
  | |-- polymer-networking 0.9.18+1.21.1
  | | -- polymer-common 0.9.18+1.21.1
  | | -- packet_tweaker 0.5.5+1.21
  | -- polymer-registry-sync-manipulator 0.9.18+1.21.1
  |-- polymer-resource-pack 0.9.18+1.21.1
  | -- polymer-common 0.9.18+1.21.1
  | -- packet_tweaker 0.5.5+1.21
  -- polymer-virtual-entity 0.9.18+1.21.1
  -- polymer-common 0.9.18+1.21.1
  -- packet_tweaker 0.5.5+1.21
• polymorph 1.0.7+1.21.1
• prickle 21.1.6
• puzzleslib 21.1.24
• redeemed 1.1.0-BETA1
  |-- adventure-platform-fabric 5.14.2
  | |-- net_kyori_adventure-api 4.17.0
  | |-- net_kyori_adventure-key 4.17.0
  | |-- net_kyori_adventure-platform-api 4.3.3
  | |-- net_kyori_adventure-text-logger-slf4j 4.17.0
  | |-- net_kyori_adventure-text-minimessage 4.17.0
  | |-- net_kyori_adventure-text-serializer-ansi 4.17.0
  | |-- net_kyori_adventure-text-serializer-gson 4.17.0
  | |-- net_kyori_adventure-text-serializer-json 4.17.0
  | |-- net_kyori_adventure-text-serializer-plain 4.17.0
  | |-- net_kyori_ansi 1.1.0
  | |-- net_kyori_examination-api 1.3.0
  | |-- net_kyori_examination-string 1.3.0
  | -- net_kyori_option 1.0.0
  |-- com_zaxxer_hikaricp 5.1.0
  |-- org_mongodb_bson 4.11.0
  |-- org_mongodb_mongodb-driver-core 4.11.0
  -- org_mongodb_mongodb-driver-sync 4.11.0
• redstonepen 1.11.41
• reinfbarrel 2.6.1+1.21.1
  -- reinfcore 4.0.2+1.21.1
• reinfchest 3.1.1+1.21.1
  -- reinfcore 4.0.2+1.21.1
• reinfshulker 3.2.1+1.21.1
  -- reinfcore 4.0.2+1.21.1
• rewarded_daily 0.2.5
  |-- fabric-permissions-api-v0 0.3.1
  -- sgui 1.6.1+1.21.1
• rightclickharvest 4.4.4+1.21.1
• shiny-boosters 1.6.0+1.21.1
• showmeyourskin 1.11.3+1.21
• simple_copper_pipes 2.0.4
  -- frozenlib 1.9.6-mc1.21.1
• skiesannouncements 1.1.0-BETA2
  -- adventure-platform-fabric 5.14.2
  |-- net_kyori_adventure-api 4.17.0
  |-- net_kyori_adventure-key 4.17.0
  |-- net_kyori_adventure-platform-api 4.3.3
  |-- net_kyori_adventure-text-logger-slf4j 4.17.0
  |-- net_kyori_adventure-text-minimessage 4.17.0
  |-- net_kyori_adventure-text-serializer-ansi 4.17.0
  |-- net_kyori_adventure-text-serializer-gson 4.17.0
  |-- net_kyori_adventure-text-serializer-json 4.17.0
  |-- net_kyori_adventure-text-serializer-plain 4.17.0
  |-- net_kyori_ansi 1.1.0
  |-- net_kyori_examination-api 1.3.0
  |-- net_kyori_examination-string 1.3.0
  -- net_kyori_option 1.0.0
• skiesguis 1.6.0-BETA3
  |-- adventure-platform-fabric 5.14.2
  | |-- net_kyori_adventure-api 4.17.0
  | |-- net_kyori_adventure-key 4.17.0
  | |-- net_kyori_adventure-platform-api 4.3.3
  | |-- net_kyori_adventure-text-logger-slf4j 4.17.0
  | |-- net_kyori_adventure-text-minimessage 4.17.0
  | |-- net_kyori_adventure-text-serializer-ansi 4.17.0
  | |-- net_kyori_adventure-text-serializer-gson 4.17.0
  | |-- net_kyori_adventure-text-serializer-json 4.17.0
  | |-- net_kyori_adventure-text-serializer-plain 4.17.0
  | |-- net_kyori_ansi 1.1.0
  | |-- net_kyori_examination-api 1.3.0
  | |-- net_kyori_examination-string 1.3.0
  | -- net_kyori_option 1.0.0
  |-- org_graalvm_sdk_graal-sdk 22.3.0
  -- org_graalvm_truffle_truffle-api 22.3.0
• skiesjoinmessages 1.1.0-BETA1
  -- adventure-platform-fabric 5.14.2
  |-- net_kyori_adventure-api 4.17.0
  |-- net_kyori_adventure-key 4.17.0
  |-- net_kyori_adventure-platform-api 4.3.3
  |-- net_kyori_adventure-text-logger-slf4j 4.17.0
  |-- net_kyori_adventure-text-minimessage 4.17.0
  |-- net_kyori_adventure-text-serializer-ansi 4.17.0
  |-- net_kyori_adventure-text-serializer-gson 4.17.0
  |-- net_kyori_adventure-text-serializer-json 4.17.0
  |-- net_kyori_adventure-text-serializer-plain 4.17.0
  |-- net_kyori_ansi 1.1.0
  |-- net_kyori_examination-api 1.3.0
  |-- net_kyori_examination-string 1.3.0
  -- net_kyori_option 1.0.0
• skieskits 1.1.0-BETA1
  |-- adventure-platform-fabric 5.14.2
  | |-- net_kyori_adventure-api 4.17.0
  | |-- net_kyori_adventure-key 4.17.0
  | |-- net_kyori_adventure-platform-api 4.3.3
  | |-- net_kyori_adventure-text-logger-slf4j 4.17.0
  | |-- net_kyori_adventure-text-minimessage 4.17.0
  | |-- net_kyori_adventure-text-serializer-ansi 4.17.0
  | |-- net_kyori_adventure-text-serializer-gson 4.17.0
  | |-- net_kyori_adventure-text-serializer-json 4.17.0
  | |-- net_kyori_adventure-text-serializer-plain 4.17.0
  | |-- net_kyori_ansi 1.1.0
  | |-- net_kyori_examination-api 1.3.0
  | |-- net_kyori_examination-string 1.3.0
  | -- net_kyori_option 1.0.0
  |-- com_h2database_h2 2.2.224
  |-- com_zaxxer_hikaricp 5.1.0
  |-- org_graalvm_sdk_graal-sdk 22.3.0
  |-- org_graalvm_truffle_truffle-api 22.3.0
  |-- org_mariadb_jdbc_mariadb-java-client 3.1.0
  |-- org_mongodb_bson 4.11.0
  |-- org_mongodb_mongodb-driver-core 4.11.0
  -- org_mongodb_mongodb-driver-sync 4.11.0
• smartbrainlib 1.16.1
• smoothchunk 1.21-3.8
• spark 1.10.109
  -- fabric-permissions-api-v0 0.3.1
• styled-nicknames 1.6.0+1.21
  |-- fabric-permissions-api-v0 0.3.1
  -- player-data-api 0.6.0+1.21
• styledchat 2.6.0+1.21
  |-- fabric-permissions-api-v0 0.3.1
  |-- player-data-api 0.6.0+1.21
  -- predicate-api 0.5.1+1.21
• styledplayerlist 3.5.1+1.21
  |-- fabric-permissions-api-v0 0.3.1
  -- player-data-api 0.6.0+1.21
• supermartijn642configlib 1.1.8
• supermartijn642corelib 1.1.18
• t_and_t 1.13.2
• taterzens 1.15.8
  |-- config2brigadier 1.2.6
  |-- polymer-core 0.9.18+1.21.1
  | |-- polymer-networking 0.9.18+1.21.1
  | | -- polymer-common 0.9.18+1.21.1
  | | -- packet_tweaker 0.5.5+1.21
  | -- polymer-registry-sync-manipulator 0.9.18+1.21.1
  |-- server_translations_api 2.3.1+1.21-pre2
  -- sgui 1.6.1+1.21.1
• tectonic 2.4.1a
• terrablender 4.1.0.5
• terralith 2.5.7
• toofast 1.3.0
• trade_cycling 1.21.1-1.0.15
  |-- fabric-key-binding-api-v1 1.0.47+0af3f5a76a
  -- fabric-screen-api-v1 2.0.24+b55973446a
• trashcans 1.0.18
  -- team_reborn_energy 4.1.0
• trinkets 3.10.0
• vanilla-permissions 0.2.4+1.21.1
  -- fabric-permissions-api-v0 0.3.1
• villagernames 8.1
• vivecraft 1.21.1-1.1.14-b2
  |-- org_lwjgl_lwjgl-openvr 3.3.3
  |-- org_lwjgl_lwjgl-openvr_natives-linux 3.3.3
  |-- org_lwjgl_lwjgl-openvr_natives-macos 3.3.3
  -- org_lwjgl_lwjgl-openvr_natives-windows 3.3.3
• voicechat 1.21.1-2.5.26
  -- fabric-key-binding-api-v1 1.0.47+0af3f5a76a
• waystones 21.1.5
• wondertrade 1.2.6
• world-gamerules 1.2.0+1.21.1
  |-- fabric-permissions-api-v0 0.3.1
  -- message-api 0.2.4-1.21
• worldedit 7.3.8+6939-7d32b45
• yet_another_config_lib_v3 3.6.2+1.21-fabric
  |-- com_twelvemonkeys_common_common-image 3.12.0
  |-- com_twelvemonkeys_common_common-io 3.12.0
  |-- com_twelvemonkeys_common_common-lang 3.12.0
  |-- com_twelvemonkeys_imageio_imageio-core 3.12.0
  |-- com_twelvemonkeys_imageio_imageio-metadata 3.12.0
  |-- com_twelvemonkeys_imageio_imageio-webp 3.12.0
  |-- org_quiltmc_parsers_gson 0.2.1
  -- org_quiltmc_parsers_json 0.2.1
• yungsapi 1.21.1-Fabric-5.1.3
  |-- org_javassist_javassist 3.29.2-GA
  -- org_reflections_reflections 0.10.2
• yungsbridges 1.21.1-Fabric-5.1.1
  -- org_reflections_reflections 0.10.2
• yungsextras 1.21.1-Fabric-5.1.1
  -- org_reflections_reflections 0.10.2

Logs

No logs were produced relating to the issue.

Minimal instance

• I have tested this on a minimal instance

Performance and shader mods

• I am using performance or shader mods

Another set of mods we use also experienced this issue, and they implemented this fix
https://github.com/Aton-Kish/reinforced-chests/pull/73/commits/c70e3eb0f9dccdb173ed74abdba2252c72ed3a25

This would be something for the NeoForge Farmer's Delight to fix. Please report over there.

unfortunately due to component changes its expected to lose data from modded items and inventories in 1.21 switch as coding backward compat layer is quite painful

I 100% know how to do it, but it'd be a bit more effort than I'm willing to put in unfortunately. Maybe sometime in the future.

Assuming all itemstacks are stored in Items nbt field, you could use vanilla transform for this.
The code for defining layout of block entities is relatively simple, so here's mine for reference: https://github.com/Patbox/PolyDecorations/blob/master/src/main/java/eu/pb4/polydecorations/mixin/datafixer/Schema1460Mixin.java

Worth noting this will only allow data fixing of container data on version upgrades.
This would also apply to any other data change mojang does in future.

I'll get to implementing this upstream at a later date. Thanks for the info @Patbox