In the Minecraft bedrock edition of the game, there has been a recurring problem with villagers. It was common for villagers to track through walls to reach their jobs if the building was too large or if they worked on the second floor. They often get stuck on blocks when there is a pathway down right next to them, losing their jobs in the process. It does not appear that their AI is tracking their ability to climb down from high things and find how to get to their job correctly. Hopefully this can be fixed.
I'm on pc, but this problem has been happening on all devices as I've tested. I this problem is on bedrock edition