When starting kleopatra from the Dock as opposed to via command line or the launcher, it initially shows a blank window, which does not appear to react to anything, and cannot even be closed with File->Close. Selecting "Open Certificate Manager" from the dock/tray icon closes the blank window, and causes a correct main window to appear, instead.

Everything else, including the global menu, seems to work correctly.

This is a regression compared to beta814. Possibly I introduced it while fixing T8509.