i have no idea what's even happening, i just know that this issue seems prevalent with Lithium, but we're using Rubidium and there doesn't seem to be any settings related to what's happening available to me.

I am using a small TerraFirmaCraft modpack and added Origins to it, Phantom seems to be the only one being affected by issues so far.

The modpack is called Auto-TerraFirmaCraft, and we have added literally three mods to it.

SimpleVoiceChat
Origins
Moreplayermodels

https://www.curseforge.com/minecraft/modpacks/auto-terrafirmacraft-tfc-create

I don't know what is wrong. :/

This isn't really the appropriate place to report issues with the Forge port. If you're using the Forge-equivalent of Lithium (e.g: Canary), doing the thing as mentioned in #473 (comment) should fix it (you'd modify the canary.properties file instead of lithium.properties)

Oops! I'm sorry, i didn't realize! I forgot there's different hubs for some modloader variants of mods, my bad :(