1. I created another handful of key pairs and tested around. However, I could not recreate the problem now. I can store the secret key in Kleopatra, but the file differs from the backup key. It seems to be a stub indeed. And even if I want to perform an operation directly in Kleopatra, the smartcard is requested.

Why do you think you can still export more than a stub key?

The exact commands given and the output. Adding -v is always helpful.

Hi, I'm the user that reported this bug.