Currently, we have the option "Keep open after operation completed" in the result windows, in German (before improving the translation to "Auch nach erfolgreichem Ende der Operation Fenster geöffnet lassen.":

The proposal here is to reverse the logic and not have a check-mark by default, as then this new text will better explain the option:
"Close window automatically after successful completion of operations"
(German: "Fenster nach erfolgreichem Abschluss einer Operation automatisch schließen")

Remark: The option is shown for sign and/or encryption operations.