Minecraft version - 1.18.2
Mod loader - Forge
Mod version - 1.1.0
I am using the latest version available - Yes

Describe the bug
When I swing my weapon in first person mode, I can see the inside and outside of my head.

To Reproduce
Steps to reproduce the behavior:

Swing a weapon when in minecraft and in first person mode

Expected behavior
I expected to not see my head

Screenshots or video recordings

Additional context

Do you have Twilight Forest? If so, have you tried removing it?
Removing Twilight Forest fixed it for me

I also had this issue and can confirm twilight forest was the issue. Not sure what TF does with the character model though.

Verified, true.

It should be mentioned that the issue is fixed in 1.19; 1.18 won't be receiving TF updates anymore, according to the author. The issue is rooted in their trophy renderer.

Contacted Twilight Forest devs.
https://discord.com/channels/313006291012288521/373298308178771978/1012430334773710969

The issue also seems to be affecting Fabric installs for 1.18.2. I just noticed it and curseforge user
PeponcioArt seconded.

For Fabric you can just update Twilight Forest

Looks like Team Twilight Forest is working on the issue.
TeamTwilight/twilightforest@e4ae797

Big props for them!

The issue was fixed by the latest release of Twilight Forest.
https://www.curseforge.com/minecraft/mc-mods/the-twilight-forest/files/3952837