I have a problem with Thunderbird in Kubuntu 24.04.3. The drag and drop of mails from one folder to another, e.g. from inbox to a sub folder, doesn't always work. If I just start Thunderbird and begin dragging emails it works fine, but if I minimize the Thunderbird window and do some other stuff. Then when I go back in Thunderbird, the drag and drop of mails has disappeared. And the only way I get it back is ending Thunderbird and start it up again.