I can reproduce this on the command line:
C:\Users\g10code>"c:\Program Files\GnuPG\bin\gpgsm.exe" --export --armor 579BAF3DF16AD462457BCC0897ADBC143D76EA7B 5A2B80F98F518D50891B1F0C7C6131AD107F9938 DB625D2BBBB5A3FD985C0233249B03090E85D402
Issuer ...: /CN=CA IVBB Deutsche Telekom AG 20/OU=Bund/O=PKI-1-Verwaltung/C=DE
Serial ...: 02195D190EBE34
Subject ..: /CN=iOS Test-Smartcard iostest01.sc/OU=BSI/O=Bund/C=DE/SerialNumber=2
aka ..: iostest01.sc@bsi.bund.de
Keygrip ..: 527CE32FD0552D18479442EF90DD5E434C036329