It's not possible to use vfat as the backend for overlayfs as it's not a posix compatible file system. For this specifc bug, I'd suggest you just use another partition and mount it as /home/ubuntu/Documents.
It's not possible to use vfat as the backend for overlayfs as it's not a posix compatible file system. Documents.
For this specifc bug, I'd suggest you just use another partition and mount it as /home/ubuntu/