[BUG] Moving a bunch of nodes to a bunch of other nodes causes incredible amount of slowness in animations.

I'm animating like 100 nodes, and it's all fine.

If I take those 100 nodes, and add each of the 100 nodes to 100 other nodes, so now we have 100 other nodes that each have 1 child of the original 100 nodes, then animations become really slow (although CPU usage doesn't spike).

I'd like to make a reproduction soon...