Villagers despawning

Villagers, despite having history of trading multiple times, access to the workstation and beds, and having name tags on them, despawns after certain time has passed.

• Steps to reproduce the issue: Transport villagers out of the village, give them workstation and beds, trade with them, and put name tags, contain them in a isolated room.

• Expected result: Nothing happens, they remain present unless killed.

• Actual result: Eventual despawning.