Minecraft 1.18.1
Mod: 1.18-fabric0.43.1-1.5.4
No matter how I left click with holding nothing, shift or ctrl, the items are just moved to trade (always a whole stack) slot but not traded. When I right click a trade entry, it trades as much as possible, no matter I hold nothing, shift or ctrl.

Is this on a server, and if so, is the server running a different version of Minecraft and letting other versions connect through ViaVersion? If so, there's nothing I can do; some parts of the protocol just can't be translated.

Does this happen in a single user game as well?

This exactly happens in a single user game, and I don't know whether it will happen on a server because I haven't try this on a server.
The followings are my mods, which are all client side:

• Loading 136 mods:
  • advanced_runtime_resource_pack 0.5.4
  • advancementinfo 1.18-fabric0.43.1-1.3
  • advancementplaques 1.4.4
  • auto_login 1.0.1-alpha3
  • blue_endless_jankson 1.2.1 via jankson
  • bobby 3.1.0
  • caffeineconfig 1.0.0 via sodium-extra
  • carpet 1.4.57
  • chesttracker 1.1.10
  • clickthrough 1.18-fabric0.43.1-0.4
  • cloth-api 3.1.61
  • cloth-basic-math 0.6.0 via cloth-config
  • cloth-client-events-v0 3.1.61 via cloth-api
  • cloth-common-events-v1 3.1.61 via cloth-api
  • cloth-config 6.2.57
  • cloth-datagen-api-v1 3.1.61 via cloth-api
  • cloth-scissors-api-v1 3.1.61 via cloth-api
  • cloth-utils-v1 3.1.61 via cloth-api
  • com_electronwill_night-config_core 3.6.3 via forgeconfigapiport
  • com_electronwill_night-config_toml 3.6.3 via forgeconfigapiport
  • com_github_towdium_pinin 1.5.0 via roughly-enough-characters
  • com_typesafe_config 1.4.1 via confabricate
  • confabricate 2.1.0-SNAPSHOT+4.1.1 via bobby
  • continuity 1.1.0+1.18
  • cool_elytra 1.3.1
  • crowdin-translate 1.4+1.18 via clickthrough
  • detailab 2.6.1+1.18-fabric
  • easiervillagertrading 1.18-fabric0.43.1-1.5.4
  • fabric 0.45.0+1.18
  • fabric-api-base 0.4.1+b4f4f6cdc8 via worldedit
  • fabric-api-lookup-api-v1 1.5.0+17be577f65 via fabric
  • fabric-biome-api-v1 6.0.1+ded849a965 via fabric
  • fabric-blockrenderlayer-v1 1.1.9+3ac43d9565 via fabric
  • fabric-command-api-v1 1.1.6+3ac43d95c8 via worldedit
  • fabric-commands-v0 0.2.5+b4f4f6cd65 via fabric
  • fabric-containers-v0 0.1.18+d154e2c665 via fabric
  • fabric-content-registries-v0 0.4.5+6f53a73d65 via fabric
  • fabric-crash-report-info-v1 0.1.8+3ac43d9565 via fabric
  • fabric-dimensions-v1 2.1.7+43d2957165 via fabric
  • fabric-entity-events-v1 1.4.5+6b21378a65 via fabric
  • fabric-events-interaction-v0 0.4.16+bfa23f1765 via fabric
  • fabric-events-lifecycle-v0 0.2.6+b4f4f6cd65 via fabric
  • fabric-game-rule-api-v1 1.0.10+3ac43d9565 via fabric
  • fabric-item-api-v1 1.3.0+691a79b565 via fabric
  • fabric-item-groups-v0 0.3.3+3ac43d9565 via fabric
  • fabric-key-binding-api-v1 1.0.8+c8aba2f365 via fabric
  • fabric-keybindings-v0 0.2.6+b4f4f6cd65 via fabric
  • fabric-language-kotlin 1.7.0+kotlin.1.6.0
  • fabric-lifecycle-events-v1 1.4.13+713c266865 via sodium-extra
  • fabric-loot-tables-v1 1.0.8+3ac43d9565 via fabric
  • fabric-mining-level-api-v1 1.0.3+3ac43d9565 via fabric
  • fabric-mining-levels-v0 0.1.7+b4f4f6cd65 via fabric
  • fabric-models-v0 0.3.3+3ac43d9565 via fabric
  • fabric-networking-api-v1 1.0.18+3ac43d9565 via fabric
  • fabric-networking-v0 0.3.5+b4f4f6cd65 via fabric
  • fabric-object-builder-api-v1 1.11.0+3b82842e65 via fabric
  • fabric-object-builders-v0 0.7.8+3ac43d9565 via fabric
  • fabric-particles-v1 0.2.9+526dc1ac65 via fabric
  • fabric-registry-sync-v0 0.8.6+533be9ba65 via fabric
  • fabric-renderer-api-v1 0.4.9+3ac43d9565 via fabric
  • fabric-renderer-indigo 0.4.12+3ac43d9565 via fabric
  • fabric-renderer-registries-v1 3.2.7+b4f4f6cd65 via fabric
  • fabric-rendering-data-attachment-v1 0.3.4+7242e9d765 via fabric
  • fabric-rendering-fluids-v1 0.1.18+3ac43d9565 via fabric
  • fabric-rendering-v0 1.1.9+b4f4f6cd65 via fabric
  • fabric-rendering-v1 1.10.3+6b21378a65 via fabric
  • fabric-resource-loader-v0 0.4.11+3ac43d9565 via fabric
  • fabric-screen-api-v1 1.0.7+3ac43d9565 via fabric
  • fabric-screen-handler-api-v1 1.1.11+3ac43d9565 via fabric
  • fabric-structure-api-v1 2.0.8+295197a765 via fabric
  • fabric-tag-extensions-v0 1.2.5+3ac43d9565 via fabric
  • fabric-textures-v0 1.0.9+3ac43d9565 via fabric
  • fabric-tool-attribute-api-v1 1.3.4+7de09f5565 via fabric
  • fabric-transfer-api-v1 1.5.6+b4f4f6cd65 via fabric
  • fabricloader 0.12.12
  • ferritecore 4.1.2
  • firstperson 2.1.0
  • forgeconfigapiport 3.1.1
  • gbfabrictools 1.3.4+1.18 via clickthrough
  • iceberg 1.0.38
  • indium 1.0.2-alpha3+mc1.18.1
  • infinitemusic 1.5.1
  • inventoryprofilesnext 1.3.4
  • io_leangen_geantyref_geantyref 1.3.11 via confabricate
  • iris 1.2.0-pre
  • item_export 1.18-1-5
  • itemscroller 0.15.0
  • jankson 4.0.0+j1.2.0 via libgui
  • java 17
  • lambdabettergrass 1.2.2+1.17
  • lazy-language-loader 0.2.6
  • legendarytooltips 1.2.4
  • libgui 5.0.0-beta.2+1.18-rc1 via chesttracker
  • libninepatch 1.1.0 via libgui
  • litematica 0.10.4
  • lithium 0.7.7
  • malilib 0.11.7
  • masa_gadget_mod 2.0.8
  • merchantmarkers 1.1.2
  • midnightlib 0.3.1 via cool_elytra
  • minecraft 1.18.1
  • minihud 0.21.4
  • modmenu 2.0.4
  • multiconnect-api 1.5.10 via masa_gadget_mod
  • ommc 0.4.1
  • org_anarres_jcpp 1.4.14 via iris
  • org_jetbrains_kotlin_kotlin-reflect 1.6.0 via fabric-language-kotlin
  • org_jetbrains_kotlin_kotlin-stdlib 1.6.0 via fabric-language-kotlin
  • org_jetbrains_kotlin_kotlin-stdlib-jdk7 1.6.0 via fabric-language-kotlin
  • org_jetbrains_kotlin_kotlin-stdlib-jdk8 1.6.0 via fabric-language-kotlin
  • org_jetbrains_kotlinx_kotlinx-coroutines-core-jvm 1.5.2 via fabric-language-kotlin
  • org_jetbrains_kotlinx_kotlinx-coroutines-jdk8 1.5.2 via fabric-language-kotlin
  • org_jetbrains_kotlinx_kotlinx-serialization-cbor-jvm 1.3.1 via fabric-language-kotlin
  • org_jetbrains_kotlinx_kotlinx-serialization-core-jvm 1.3.1 via fabric-language-kotlin
  • org_jetbrains_kotlinx_kotlinx-serialization-json-jvm 1.3.1 via fabric-language-kotlin
  • org_joml_joml 1.10.2 via sodium
  • org_slf4j_slf4j-api 1.7.12 via iris
  • org_spongepowered_configurate-core 4.1.1 via confabricate
  • org_spongepowered_configurate-extra-dfu4 4.1.1 via confabricate
  • org_spongepowered_configurate-gson 4.1.1 via confabricate
  • org_spongepowered_configurate-hocon 4.1.1 via confabricate
  • reasonable-sorting 1.5
  • reeses-sodium-options 1.4.0
  • roughly-enough-characters 0.0.4+1.18.1-fabric0.12.12
  • sodium 0.4.0-alpha6+build.14
  • sodium-extra 0.4.0
  • spruceui 3.3.2+1.17 via lambdabettergrass
  • trajectory-preview 1.0-1.18.1
  • tweakeroo 0.12.3
  • whereisit 1.14.7 via chesttracker
  • worldedit 7.2.8+6008-1246d61
  • worldeditcui 1.18.1+01
  • xaero_map_addition 0.1.4
  • xaerominimap 22.1.2
  • xaeroworldmap 1.20.1
  • xray 2.0.1

Same issue for me with almost the same mods. I hope there will be a hint soon of what is causing the mod not to work

Same issue for me with almost the same mods. I hope there will be a hint soon of what is causing the mod not to work

I found the problem. Just disable Item Scroller's favorite trades.