1. Have looping animation with smooth Physbone rotation built in 3.2.0
  2. Update to 3.2.1
  3. Animated Physbones no longer appear smoothly animated and instead seem to "lock" to positions.
What my Animated Ears looks like in VRChat and 3.2.0:
What they look like in Unity with 3.2.1 SDK: https://i.gyazo.com/559e442dfc6bb82fc98b034950cf6d84.mp4
They still move properly when uploaded to VRChat, this just makes it harder to test the animation curves of the animation without uploading first.