I got a crash when I got in another dimension with the config for the spawn of the wildens to 0. I didn't want them to spawn(already got everything before the update with them) so I put 0 put every time I when to another dimension like the moon of Space Bosstools the server or if in solo the game crash. I got the same crash in the overwolrd but that was in the mushroom island and sense the update no crash even with the config to 0 otherwise everything seem ok but I didn't test for the nether if that crash or not.
Crash report about going on the moon (other mod) : https://pastebin.com/KABxnxnA

Happen/tested in the version: ars_nouveau-1.16.4-1.12.1, ars_nouveau-1.16.4-1.12.4

Also I don't know if this is normal or not but the Wildens with the Xearo's minimap mod are show as passive mob not hostile and I'm pretty sure they're hostile not passive.

Should now be fixed, as well as a new dimension blacklist in the config: https://www.curseforge.com/minecraft/mc-mods/ars-nouveau/files/3278608