Multiple villagers will bind to the same work station and villagers that are master class at a work station will suddenly switch stations if I put down another of the same type. I was breeding villagers and there was a single lecturn in the area (they were in a cobblestone cube with no doors) and 3 villagers bound to that single lecturn. I put all villagers into their own cubicles to block their pathfinding, and that did unbind them, but once I put down another lecturn, the master villager I had bound to the one I had just placed, despite having been bound to the one in front of him moments before. I know this was an issue in the past and it was said to be fixed but that is certainly not the case for me. In one bizarre moment, one of my villagers bound to a stone block. (I learned this using a tool to find villager workstations).