advancement plaques' Iceberg dependency isn't mentioned when the game crashes due to it not being in the mods folder, instead, the game just crashes without giving a crash report.

I think this was referencing the Fabric 1.18 version of the mod, and this issue has been fixed in the latest release so I am closing this issue. If it was for a different version please create a new issue with that information included.

Hmm, that is not normal behavior, I don't think I've seen that before. I need more information:
Minecraft version
Forge or Fabric
Mod version