Starting point: Key "Alice" with ADSK subkey. (The public key to which the ADSK belongs is in the keyring.)
Encrypt a file to Alice.
Decrypt it again. The info shown is recipients Alice + unknown. Audit log shows Alice as the recipient twice with the keyIDs for both encryption resp. ADSK subkeys:
{F15258696}
~~How would it be correct? Show Alice twice as recipient, both times with the KeyID of the primary key?~~
**Edit 2024-10-16:**
As suggested by Tobias finding, part of the time the same decryption displays the second recipient:
{F15927337}
**Edit 2024-11-05:**
It was decided that the owner of the ADSK key should be listed as the second recipient, if possible, which it is in the case described above.
And the listing should consistently always show the same info, of course.
For details see https://dev.gnupg.org/T7334#193396