Temp fix; Double your outside walls that beds touch. You can do so with barrier blocks so you keep the buildings original look. Villagers won’t attempt to pathfind through doubled walls and will eventually find their beds once again.

also put barrier blocks 2 high around the building to eliminate inner corners.

do not put any barrier blocks in front of doors.

No this does not resolve the issue. 
There is an ongoing bug which has not been addressed properly.

The game remains unplayable village wise in the bedrock 1.16.201 version.

Villagers lose their path to beds and workstation even if they found and used it originally.

It usually happens the second night, everything looks fairly ok the first night.

If I understand you, you have villagers who just stand beside a wall when they are trying to get to their beds, and the beds are on the other side of the wall from the villagers.

This happens because villagers can only search a limited distance for a path to their beds. If the shortest path to their bed is longer than the limited distance, they get as close as they can, which is often right outside the wall. Try nudging the villager closer to the door it needs to go through. If it suddenly finds its bed and lies down, this is the explanation for its behavior and it is working as intended. You might want to add another door on the wall where the bed is located, or add one on the side of the building that faces the village center (since that's where the villager will often be coming from when it's time to sleep).

Please let us know if this resolves your issue.

This is probably a duplicate of MCPE-51216