You can ignore the windows machine unless it’s using nfs, it’s not relevant.

Your screenshot suggests my guess was incorrect because you do not have any authorised Networks or Hosts defined.

Even so if it was me I would correctly configure authorised hosts or authorised networks just to rule it out, as it neatly explains why it works on one container but not another. Does the clone have the same IP by any chance?

The only other thing I can think for you to try is to set maproot user/group to root/wheel and see if that helps but it’s just a shot in the dark.