It kind of looks like a transparent frame is being rendered (e.g. the texture is being un-set somewhere).

This seems to only happen when transitioning from "RestPose" -> any other animation, and not the other way around. Adding a buffer texture that gets SetTexCoord() and SetTexture() called first (then the real texture is updated, and everything is hidden/shown appropriately) doesn't seem to fix anything (although it should?).

Possibly something in the texture initialization is causing this?