Bug description
While trading with a villager in the trader block, "waiting for server" will appear in the one probe and doesn't seem to go away. Seems to occur after naming the villager and taking them out and putting them back in the trading block a few times. Logging out and back in after the waiting message causes the chunk the trader was in to regenerate, losing everything placed/mined in the chunk.

(Delivery Inc Modpack)

Steps to reproduce the issue

1. Get a trader block, profession block (composter) and a villager
2. Trade with villager to lock in profession
3. Take villager out of trader and name in an anvil (was my method to keep track of who had what trades)
4. Put villager back in to trader and trade again, until the trades you have are exhausted
5. Take the villager out of the trader and put in a chest. (usually to be replaced by another villager without exhausted trades)
6. Take original villager back out of the chest, put back in trader and once trades reset, continue trading
7. Notice that brackets have been added to the villagers name, they seem to compound each cycle of in/out.
8. Repeat 4-7 ad nauseum. By the time we are in the right area, the villager has 4-5 sets of brackets around its name.
9. Continue trading until the one probe indicates "Waiting for Server" (this is singleplayer). Message doesn't seem to go away by waiting
10. Log out, Log back in
11. Chunk has regenerated, everything inside is lost.
12. Here's an (unlisted) video https://youtu.be/3CVcra-VM5k

Expected behavior
Chunks not to regenerate.

Log files
Debug https://gist.github.com/47MarkIV/9f0cf7143110156e5836d36b704c8227
Latest https://gist.github.com/47MarkIV/a6d57e365cffd442da79646671f1e4aa

Versions

• Minecraft version 1.16.5
• Forge version 36.1.0
• Mod version 1.0.6
• Modpack version 1.0.16

Other mods

Tested with only Forge, JEI and Easy Villagers and was able to reproduce, same mod version numbers as the pack.

Pack Mods
architectury-1.10.139-forge.jar
AutoRegLib-1.6-47.jar
BetterCaves-Forge-1.16.4-1.1.1.jar
BetterMineshafts-Forge-1.16.4-2.0.3.jar
BetterTitleScreen-1.16.4-1.10.2.jar
Bookshelf-1.16.5-10.0.7.jar
BotanyPots-1.16.5-7.0.10.jar
BotanyTrees-1.16.5-3.0.2.jar
buildinggadgets-1.16.5-3.8.0.jar
byg-1.1.14.jar
camera-1.16.5-1.0.10.jar
cc-tweaked-1.16.4-1.95.3.jar
chiselsandbits-0.3.4-RELEASE.jar
chunkloaders-1.1.6-mc1.16.5.jar
ClickMachine-1.16.4-4.3.0.jar
cloth-config-4.11.18-forge.jar
Clumps-6.0.0.17.jar
CobbleForDays-1.3.1.jar
CodeChickenLib-1.16.4-3.5.1.408-universal.jar
cofh_core-1.16.4-1.2.1.jar
compactmachines-4.0.0-beta.2.jar
Compressium-1.16.5-1.2.2.jar
corpse-1.16.5-1.0.1.jar
CraftTweaker-1.16.5-7.1.0.179.jar
Cucumber-1.16.4-4.1.9.jar
curios-forge-1.16.5-4.0.5.0.jar
DarkUtilities-1.16.5-8.0.3.jar
DefaultOptions_1.16.3-12.2.0.jar
delivery-1.16.5-1.0.38.jar
easy_villagers-1.16.5-1.0.6.jar
EnderStorage-1.16.4-2.7.1.166-universal.jar
extradisks-1.16.4-1.5.0.jar
ExtraStorage-1.16.4-1.3.1.jar
extremeSoundMuffler-3.9_Forge-1.16.5.jar
ftb-backups-2.1.1.6.jar
ftb-chunks-1605.2.3-build.75.jar
ftb-gui-library-1605.2.1.41-forge.jar
immersive-portals-0.16-mc1.16.5-forge.jar
industrial-foregoing-1.16.5-3.2.10.2-d316328.jar
InitialInventory-5.0.1.11.jar
ironchest-1.16.4-11.2.10.jar
JAOPCA-1.16.5-3.4.0.7.jar
jei-1.16.5-7.6.1.75.jar
JEITweaker-1.16.5-1.0.1.14.jar
JustEnoughResources-1.16.3-0.12.0.100.jar
light-overlay-5.8.0.jar
mcjtylib-1.16-5.0.19.jar
Mekanism-1.16.5-10.0.21.448.jar
MekanismAdditions-1.16.5-10.0.21.448.jar
MekanismGenerators-1.16.5-10.0.21.448.jar
MekanismTools-1.16.5-10.0.21.448.jar
morevanillalib-1.16.4-1.4.0.jar
Morph-o-Tool-1.4-27.jar
MouseTweaks-2.14-mc1.16.2.jar
MysticalAgradditions-1.16.4-4.1.5.jar
MysticalAgriculture-1.16.4-4.1.7.jar
MysticalCustomization-1.16.4-2.1.3.jar
NaturesCompass-1.16.5-1.8.6.jar
PackMenu-1.16.4-2.4.0.jar
Patchouli-1.16.4-50.jar
pipez-1.16.5-1.1.2.jar
Placebo-1.16.4-4.4.1.jar
pneumaticcraft-repressurized-1.16.5-2.11.4-170.jar
prefab-1.6.5.0.jar
QuantumStorage-1.16.4-5.3.0.jar
Quark-r2.4-309.jar
refinedstorage-1.9.12.jar
refinedstorageaddons-0.7.2.jar
ResourcefulBees-1.16.5-0.6.5b.jar
rftoolsbase-1.16-2.0.10.jar
rftoolsbuilder-1.16-3.0.16.jar
rftoolsutility-1.16-3.0.25.jar
rsrequestify-1.16.3-2.0.1.jar
Runelic-1.16.5-7.0.1.jar
serverconfigupdater-1.3.jar
shutupexperimentalsettings-1.0.3.jar
sleeping_bags-1.16.5-1.0.1.jar
SolarFluxReborn-1.16.3-16.2.3.jar
sophisticatedbackpacks-1.16.4-2.2.8.232.jar
Storage4ComputerCraft-1.16.4-1.2.2.jar
StorageDrawers-1.16.3-8.2.2.jar
supermartijn642configlib-1.0.5a-mc1.16.jar
theoneprobe-1.16-3.0.7.jar
thermal_expansion-1.16.4-1.2.0.jar
thermal_foundation-1.16.4-1.2.0.jar
titanium-1.16.5-3.2.8.1.jar
torchmaster-2.3.6.jar
trashcans-1.0.8-mc1.16.4.jar
vanillahammers-1.16.4-2.2.0.jar
Waystones_1.16.5-7.4.0.jar
YungsApi-1.16.4-Forge-4.jar
AkashicTome-1.4-16.jar
angelring-1.16.3-1.3.3.jar
antimobgriefing-1.16.5-1.0.2.jar

Screenshots (Optional)
Video https://youtu.be/3CVcra-VM5k

Tested in 1.0.7 and everything looks to be fixed! Thank you so much :)

No problem!

Thank you for reporting this issue!
It seems that this chunk issue is related to the villager name.
Can you test it with version 1.0.7?