I have been playing a game in 1.14.4 in a village, and after altering the beachfront for a bit, I noticed no one was around and discovered the entire village was empty. I can safely say it wasn't related to something killing them; I have a datapack that alerts me of their deaths installed, but the village was completely and utterly empty.

Looking through the previous versions of this bug, they all seem to be in 1.14.1 or 2, and they're marked as resolved. I'm assuming that it's the same issue still with them clipping during saving or something but I really have no idea.