Villagers can pathfind all the way back to their original village even there is a closer bed right next to them

Basically the way you produce this bug is by just taking a villager into a boat, take that villager around 3 to 4,000 blocks away from it’s original village, put a bed and a bell down, make it night give it speed 3 (2 is best) and follow it.

(a video explaining this better)