I confirm: The Museum level in Field Trip world is bugged. Buddy Bunnies are going off path when they are supposed to leave anthropology room, ending up stuck against the wall. I don't think it can be fixed, just letting everybody else know that you can't 100% finish that world.
there's probably never going to be an official patch, game is too old, BUT some clever person found a workaround, should work for Dr. Lunatic as well as Supreme with Cheese:
https://itch.io/t/1748573/how-to-avoid-the-museum-bug
https://www.twitch.tv/videos/742948123
I followed that, and it does work for me, so you should be able to 100% it!