I have been a long time user of keepassxc. One of its features was that it automatically cleared the clipboard ten seconds ofter copying a password to it (that is the default value - it can be changed).

After upgrading Plasma Workspace (and associated software) from 5.8.3 to 5.11.5, keepassxc no longer clears the clipboard. They blame klipper (of course), and I do notice that there is a "Prevent empty clipboard" setting now (which I have deselected, but it still didn't make any difference). Any idea what is going on, and any workarounds so that keepassxc can clear the clipboard (when using klipper) again?

Phabricator:
Klipper: Remove first history item on clipboard clear - https://phabricator.kde.org/D12373
Klipper: Do not insert secret data into history - https://phabricator.kde.org/D12539