Villagers are supposed to link only to workstations within a 16 block horizontal, and 4 block vertical area. However, upon linking to a workstation, if moved outside of this area, the villager will continue to be linked to this workstation and will not link to any other workstations.

This can be easily replicated by placing a villager on a piston, then going 4 blocks down from where the extended head of the piston will be. Next, place a workstation so that the villager, when on the extended piston, won't be able to link to it, however, will link when the piston isn't extended. Unpower the piston, then the villager will link to the workstation. Upon extending the piston again, the villager will still be linked to the piston and will not link to any other workstations in the area. This also happens with rails, and presumably any other way that villagers might be able to move.

This makes villagers incredibly inconsistent, as the only way to delink them from this workstation would be to break it or move them incredibly far away. Ideally, Bedrock should get Java linking mechanics, but this seems like unintended behavior for Bedrock linking mechanics.