After creating an animation on the animation controller, the animation is not saved after saving the room, or copied when copying or cloning the animation because the parts of the animation are removed from the animation controller, which makes it impossible for me to use animations in my room.
This happens to me across all R2 rooms, but it only recently happened, the animations I made a few months ago still work as normal. I think that the most recent room I made which still has a working animation controller was created 3/27/25.