I've created a modpack for my friends and I, but we keep crashing on our multiplayer server seemingly whenever models load/reload. For example, when I click "Reload Models" through the menu, the game crashes for me.

There's also a strange visual bug where sometimes our models switch even for players not using any custom models. I don't use any custom models, but sometimes, my player model keeps switching to my friend's custom Avali or moth model while, sometimes, their own models revert to their default skins.

Crash log below:
crash-2023-02-19_15.34.58-client.txt