Can't save if opened from file manager

[mm47]

When I open a .txt file from the Android File Manager and choose to open it with Editor, I can edit normally, but when I try to save (flop disk icon) I'm showed this warning:

If I open any file from the Open Recent in the menu, I can save (flop disk icon) normally, but sometimes a recent created file won't show up in the Open Recent menu, so I have to open it from the File Manager, edit it, discard the changes and then open it from the Open Recent in the Editor's menu.

Is there anything I can do on my device to fix this? Any permissions or configs? (Android says all permissions for Editor are allowed).

Android 10
Editor 1.87

[mm47]

Sorry, I haven't seen there was another issue like this one.