According to your testing, does the issue occur with ONLY Immersive Portals mod installed?

Yes

Forge Version

43.3.5

ImmersivePortals Version

2.3.5-mc1.19.2-forge

Latest Log

https://gist.github.com/Explode007/269598b3730d098316420c0755b72765.js

Crash Report (if applicable)

No response

Steps to Reproduce

1. Have immersive portals & alexsmobs
2. Hit giant squid
3. Game is exited with error saying: [17Nov2023 00:36:08.312] [Server thread/INFO] [net.minecraft.server.network.ServerGamePacketListenerImpl/]: Frilled_Shrimpo lost connection: Internal Exception: java.lang.IllegalArgumentException: Maybe a mod is trying to add entity in a non-server thread. This is probably not ImmPtl's issue

What You Expected

The game not to exit when being grabbed by a giant squid and simply continue fighting it.

What Happened Instead

Game is exited with error saying: [17Nov2023 00:36:08.312] [Server thread/INFO] [net.minecraft.server.network.ServerGamePacketListenerImpl/]: Frilled_Shrimpo lost connection: Internal Exception: java.lang.IllegalArgumentException: Maybe a mod is trying to add entity in a non-server thread. This is probably not ImmPtl's issue

Additional Details

Why is there a 3rd checkmark forcing me to check on fabric if some mod incompatibility may arise where the other mod is not on fabric and only on forge, silly for it to be a requirement.

Please Read and Confirm The Following

• I have confirmed this bug can be replicated without the use of Optifine.
• I have confirmed the details provided in this report are concise as possible and does not contained vague information (ie. Versions are properly recorded, answers to questions are clear).
• I have confirmed this does not happen on the fabric version (If it does please report to here instead).
• I have confirmed I'm not using a hybrid server (Magma, Cauldron) or a different (non official) Forge Server release.
• I have confirmed this issue is unique and has not been reported already.