When I select multiple mails at once and then hit the delete key, the mails disappear for a fraction of a second and then return to the list. I suspect the mails are deleted on the server side though because
1. looking at the same mail folder with thunderbird, the messages are gone
2. restarting kontact/kmail updates the list correctly

Also before restarting kontact/kmail (and after hitting the delete key), these messages do appear in the trash folder (both in kmail and thunderbird). So it seems kmail (or akonadi?) is getting confused when I try to delete multiple messages at once.


It's unfortunately not happening each time. But I can easily reproduce it 99% of the time. I haven't figured out yet what's different in the 1% where it does work. It seems like it works when the program is first started and I haven't manipulated any mails yet, but that's just a first guess.

I didn't see this problem with kmail 5.4.3 (the current default on Fedora 25). The issues started after upgrading my system to Fedora 26, which ships kmail 5.5.1 at present.