I had the known problem of not having any content in ossofilemanager an all those file-open dialogues etc.

[no files / folders]

I've found a workaround: use a loop device in between. Instead of mounting /dev/mapper/mydocs_luks directly to /home/user/MyDocs I use a loop device in osso-mmc-mount.sh:

if [ "$PDEV" = "/dev/dm-1" ]; then
PDEV=$(losetup -f)
losetup $PDEV /dev/dm-1
fi

Now my filemanager is filled with files, even if there's nothing changed in my file system tree.