After successful decryption the window showing the result has a "Save All" button and (usually) a "Show Audit Log" button for the decryption.

Press Tab until the "Show Audit Log" button has focus. Then press Enter.

Expected result:
Nothing happens. (Ideally Enter would trigger the focused button, but that's out of scope of this ticket. See T6110: Kleopatra: All buttons shall be activatable with the Enter/Return key.)

Actual result:
Save All is triggered.

The screenshot shows that the "Show Audit Log" button has the focus frame but the "Save All" button is painted as default button. Pressing Space triggers the former button while pressing Enter triggers the latter.