I have a UK passport and Czech temporary residency card. I travelled from Prague to Frankfurt on Wednesday and then on Thursday from Frankfurt to Munich then Singapore (the flight Fra-Mun-Sin in business was much cheaper than just Mun-Sin even though it’s the same flight(!?!).
When going through passport control at Munich after scanning my passport the agent asked me when I travelled to Germany and did I have a permit?! I was a little confused but then told her I had a Czech residence permit and seemingly this was fine. She sternly said I should show both next time! If I didn’t have that permit card would I have had a big problem? I know about the EITAS from Nov 2023 but didn’t think there would any issue at the moment. I didn’t want to hang around and ask her to explain further :)