How to reproduce:

• OpenPGP-sign a folder (or multiple files).
• On "Sign" Kleopatra will show a "Unusual Signature Warning" message.
• Press Continue and enter the passphrase of the signing key (if asked for it).
• Kleopatra shows the success message.
• Press Finish

Expected result:
The Sign/Encrypt dialog is closed.

Actual result:
Kleopatra shows the "Unusual Signature Warning" message again.