Multiple villagers are attached to the same profession block

The bug

I am trying to build a trading hall on my world and I notice that jobless villagers entering the area are automatically taking certain jobs when there aren't associated work blocks for them to attach to. When I run the /data get entity  [ID] Brain command, the newly entering villagers are attaching to blocks that are already claimed by other villagers. Breaking that block and rechecking doesn't change the associated block.

How to reproduce

From Pelle Reinke in this comment

• Have an enclosure with a couple of villagers in
• Place one jobsite block of any type
• Trade with the villager who aquired the job to lock it in outside working house (2000-9000 tick) quickly break the jobsite block and replace it with the same type and observe a new villager have aquired a profession and both the locked in and new villager will show they have claimed the same jobsite.

→ When the time of the day reaches 2000, both will begin to work at the same jobsite. Logging out and back in to the game wont change this.