if i'm focused on a message, and i hit + to move the focus to the next unread message, i end up with both the message i am coming from AND the message i am moving to, selected. this means when i then hit Delete to delete the second message, both the second and first messages are deleted.
I am unable to reproduce this bug in 5.9.1 on Archlinux. Are you able to update and reproduce? If not, can you please tell which message list mode, ordering, grouping, etc you are using?
Created attachment 114875 [details] screen shot showing two selected messages after i read your message, i hit +, and both your message and the one following it in my inbox became selected. i took a screen shot. i attached that here. this is not a reliable problem. sometimes i can reproduce it, as now. my pane geometry may be unusual. i have sorting by date/time, aggregation by flat date, theme classic. headers are kmail 5.2, attachments are smart. i "use fixed font".
I did some tests but wasn't able to reproduce in kontact/kmail 5.9.1 on Archlinux. Not sure when 5.9.1 will be released to you by OpenSUSE but chances are, that the bug got fixed in the meantime. So if nobody else is able to reproduce, I would suggest you to wait for 5.9.1 and see if the problem persists. I will have my focus on the described behaviour in my daily usage of kontact, but I cannot remember that something alike happend to me in the past.
suse tumbleweed upgraded kmail to v5.9.1 today. i was able to reproduce the + behaviour i described earlier. but only when i was on the last previously-read message, and new unread messages had been received. + gave me a double selection: keeping the last previously-read message, but also selecting the first of the newly-received unread messages. v5.9.1 fixes a lot of other things related to mailbox and imap server asynchrony, so i am extremely grateful to all who participate as devs here. i don't know KDE or C++, so i'm strangely limited to being just-a-user of this software. please do not take any of my bug reports as critical of anyone's skills or motives -- i am trying to help with feedback of any kind.
I still cannot reproduce. But I have had similar issues regarding the last message in the list. When I deleted them, the message list went empty and i had to switch to anouther folder and back to get the list again. That might be related somehow, but is just a guess.
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This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!