That’s not a flatpak bug. I have no flatpaks installed on my PC. It happens when df is run as a normal use. I gtet the exact same message when I run df as a normal user.
However, when running it a root I have no problems. So it’s, quite obviously, some permission issue. Which, I suspect, isn’t an error but how it should be.
Well, I think I remember seeing/getting that message for quite some time. And I didn’t get it as root so I thought that was how it should be. Obviously I was wrong.
umount /run/user/1000/doc
then change permissions to “Can View modify Content”:
.
Result:
works until reboot ==> then its restored to before state. No solution yet.
Or: