2025.6.3.724 - Fix another cause of skinnes meshes not rendering

Another patch, fixing another case of skinned meshes not rendering!

Compatible with previous, but update recommended again (if there are users in the session with older build, they might disable the skinned mesh in some cases).

Fixes:

• Fixed SkinnedMeshRenderer breaking in FastDisjointRootApproximate & MediumPerBoneApproximate modes when disabled or duplicated (reported by @rixx_vr, @nanotopia, @Creator Jam, @demonzla, @_deltawolf, issue #4531)