Sims 2 Legacy - Active Sims Aren't Underwater in Hot Tub

This must be some odd shader issue hmm

I've never seen this error before. But I've seen lots of strange things over the years. What happens if you tell them to get out and back in? If you tell other Sims to shoo and move them over into the empty spots? What happens if you try to use testing cheats to reset them? Have you tried replacing the hot tub to see what happens then? I'm just trying to think of all the things that I would run through if it happened to me.