I was not able to find info on the installation type of Desktop Editor on your new OS. Could you please elaborate on this? Is it package installation or, for instance, snap?
Otherwise, a small remark regarding the .deb setup.
Am I wrong to say that with this kind of setup, dialog boxes are not managed the same and are considered as a new window, not as “the same”:
IMHO it is less user friendly so I might switch back to the package once the other issues are a little clarified.
As mentioned in the first message, this happens with any file. I started this thread with the file I encountered the issue with, then I tried with a random file and got the problem so I added the comment btw brackets.