When I was testing out my conduit for an achievement for staying underwater for three days, A drowned swam to me and spun around like crazy, with legs clipping through walls and stuff like that.

Steps to reproduce (This is how I made this happen on accident

1. Have a hole as shown in the world download and video

2. Make a conduit as shown in the world download and video

3. make drowned swim right down onto that one piece of gravel that's sticking up

What I expected: The drowned to continue swimming towards me

What happened: The Drowned spinning

Video (Because the file was too big): https://www.youtube.com/watch?v=mNAQRez6Ly4

World (If you need it) https://www.mediafire.com/file/5c39k1m1rllrj3o/Survival_Realm_-_Copy.mcworld/file