[1.16.5] FAWE still erroring

[EdoEquin0x]

Minecraft Version : 1.16.5

Mohist Version : Latest, 131

Operating System : Windows 10

Concerned mod / plugin : FAWE 2.2.1 and 2.8.0, both giving the same results

Logs : Link(s) of logs and crash reports if you have

Steps to Reproduce :

1. Install FAWE
2. Install some mods
3. Notice that it quickly stop working

Description of issue : FAWE works very well on its own but quickly begins to no longer work when in contact with mods, no commands are actually working and an error is displayed when connecting to a player's server (at the top of the logs)

[EdoEquin0x]

After a lot of trial and error, I noticed some interesting things:

1) The "java.lang.NoClassDefFoundError: Could not initialize class com.sk89q.worldedit.world.block.BlockTypes" error that prevent the user for using FAWE commands appear when installing mods such as "rats" or "Supplementaries" Rats / Supplementaries

2) There is another error that occur when installing mods that add a lot of blocks (Tried with Compat O plenty, Biome You'll Go and I Like Wood), I guess it may be related to an overload of Block ID or something like that. The bug is quite simple: FAWE commands works but when editing the terrain some blocks get randomly replaced by others. No log messages are displayed about it.

Here is an exemple with a sphere brush placing air in the ground, you can notice some stone block were randomly replaced by snow, in this example I added "I like wood" and his BOP compat but same thing happen with other mods I mentioned.