ConcurrentModificationException upon player disconnect, deletes chunk

[LordShrek]

Minecraft Version: 1.18.1

Forge Version: 39.0.88

I'm having a problem on a forge server: on rare occasions, a chunk that a player has loaded will get deleted when they log off. in both observed cases, this has been in a chunk with blocks from a handful of different mods.

Here is the stack trace

modlist:

appleskin-forge-mc1.18-2.4.0.jar

artifacts-1.18.1-4.0.3.jar

BiomesOPlenty-1.18.1-15.0.0.104-universal.jar

blockui-1.18.1-0.0.43-ALPHA.jar

cc-tweaked-1.18.1-1.100.2.jar

Clumps-forge-1.18.1-8.0.0+5.jar

Colony4ComputerCraft-1.18.1-2.1.0.jar

Controlling-forge-1.18.1-9.0+15.jar

create-mc1.18.1_v0.4e.jar

Cucumber-1.18.1-5.0.3.jar

curios-forge-1.18.1-5.0.6.2.jar

domum_ornamentum-1.18.1-1.0.39-ALPHA-universal.jar

expandability-5.0.0-forge.jar

flywheel-forge-1.18-0.6.1.jar

hexcasting-0.5.0.jar

ironchest-1.18-13.0.7.jar

jei-1.18.1-9.2.1.69.jar

kotlinforforge-3.1.0-obf.jar

Mantle-1.18.1-1.8.31.jar

minecolonies-1.18.1-1.0.428-RELEASE.jar

MouseTweaks-forge-mc1.18-2.21.jar

multi-piston-1.18-1.2.2-ALPHA.jar

MysticalAgriculture-1.18.1-5.0.3.jar

NaturesCompass-1.18.1-1.9.5-forge.jar

Patchouli-1.18.1-65.jar

productivebees-1.18.1-0.8.0.8.jar

reap-1.18.1-1.0.0.jar

structurize-1.18.1-1.0.342-RELEASE.jar

TConstruct-1.18.1-3.4.1.46.jar

TerraBlender-forge-1.18.1-1.1.0.77.jar

torchmaster-18.0.3-beta.jar

Xaeros_Minimap_22.3.0_Forge_1.18.jar

XaerosWorldMap_1.20.3.1_Forge_1.18.jar