After updating to the latest sdk 3.8.0 I've been getting a new error on two physbone scripts "Cyclic dependency found for component VRCPhysbone"
It looks like the error is because the two physbones can interact with each other via coliders placed on each bone.
Physbone A can collide with Phsybone B
Physbone B can collide with Phsybone A
As far as I know the components behave as expected so I am not sure why there is an error warning against it nor does the error provide too much info on how to keep the functionality and remove the error.