I use Klipper to preserve buffer history. Both buffers (primary and select) are synchronized. Sometimes when I try to paste something into Konsole I have to press Ctrl+Shift+V exactly 3 times. I expect to paste after the first press, always. Reproducible: Sometimes
Will recreate this bug, since the problem not always with Konsole. Looks like problem is in Klipper itself.
Yes, I have this issue as well. Please re-open.