It was raining and water was falling through my roof as if there was no roof all the way down to the cave way below at y 34. It happened after closing the game while it was raining, updating to the current snapshot then reopening it. Nothing big or game breaking just wanted to let y'all know.

Recorded this video if that helps https://youtu.be/ViV-77LhZbk

If you don't accept links here then my bad