When I drag a mail from the message list to the folder tree, the drag operation shows me also a drop possibility (via a black line) *between* folders. That does not make sense. A mail will always be dropped only *into* a folder.
Thank you for reporting this issue in KDE software. As it has been a while since this issue was reported, can we please ask you to see if you can reproduce the issue with a recent software version? If you can reproduce the issue, please change the status to "REPORTED" when replying. Thank you!
Still possible with Version 5.21.3 (22.08.3)