Updated a world from 1.13 to 1.14, and the villagers in my original base, the one from 1.13 were on an island, so Villagers getting into water happens quite frequently.

Whenever villagers, Farmers specifically, got into the water, there seems to be a small chance that, instead of going to shore in the night, they go out to the ocean, and start rapidly spinning. When day cycles back, they do not seem to come back to land, just stay still and occasionally spin