I don't know if this is intended but it looks bad, especially on 2D items.

MC 1.20.4, Fabric API 0.95.1, CreativeCore 2.11.16, ItemPhysic Lite 1.6.3

Actually that is intended as long as they float, once they hit the ground it should stop. They should only rotate slowly though.

Will close this issue for now. Don't see any issue here.

You're telling me this is intentional?

Something like angVel *= 0.99 each tick would make it look less out-of-place IMO.

Yes that is intentional and there is no angular motion that's why it cannot slow down over time. You can modify the overall speed, but that's it. This is a very basic mod and adding more calculations would mean a deeper change in how items work (which would affect server side as well).