Pulling or starting some Docker containers causes my /mnt/user mountpoint to be lost until system is rebooted.

Lately I've been having an issue where when I add a new container to the system by creating a docker-compose.yml and then using docker-compose to pull or run the container, I lose the /mnt/user mountpoint entirely. To get it back I have to reboot the system.

The error when trying to do anything with /mnt/user after the problem happens is: Transport endpoint is not connected

The only thing I see in the system logs is this line:

Apr  5 11:32:30 Storage1  shfs: error: strcpy_share_path, 452: No such file or directory (2): path too long: /✔ Container graylog-mongo-1          Created 0.0s