Versions

Minecraft: 1.18.2
Fabric: 0.14.9
Hex: Commit c5c7b30
Paucal: Commit e4cddd4
Cardinal Components API: 4.2.0
Fabric API: 0.58.0+1.18.2
Iris: 1.3.1
Sodium: 0.4.1+build.15

How to reproduce

With Iris + Sodium installed and view bobbing turned on, summon a sentinel using a staff and walk on the ground while looking at the sentinel, triggering the view bobbing.
In my opinion, the sentinel appears to move as if the motion needed to correct how it looks when view bobbing, is multiplied by a constant, making it bounce around as you move. It looks very funny.

Oh christ not more fucking matrixstacks, I had to learn quaternions to get it to work even as well as it does, arghh

sigh. Should be doable though; I just need to figure out what transformations the forge version does and copy them