So…I don’t know if this is a bug or not as it doesn’t cause any errors.
When I build a full wall to hold water back, THEN break the land behind it, it leaks. But if I dig first, then build the wall, it doesn’t. Images to show what I mean:
The large wall as seen was built BEFORE the parts were dug out behind it and it “leaks”. But the small channels can be walled and broken, and they don’t.
hahaha