As described in the title, with mod enabled when switching to 3rd person view the camera is "stuck" behind the player, regardless if using glider or not. I'm making a big modpack, so it might be a compatibility issue. I have several mods affecting camera, Camera Overhaul for example. I just noticed this and can test what causes it more thoroughly when I have time.
Another thing I noticed is that glider deployment animation isn't happening. No idea about this one, maybe happens on clean install too. Will test later as well.
Fabric 1.21.1, mod v1.1.7.

Looks like the latest 1.1.8 update resolved this, closing the issue