The box code on the sticker at the bottom side of the board that works correctly has 19/03 (manufacturing date?).
The board with flipped (IMHO) connector has box code with 23/07.

I have two RPi 3 B+. One of them has camera connector with black latch/black slot, the other with black latch/white slot. It seems to me that the board with white slot is incorrectly mounted. Camera connector is flipped by 180 degrees. RPI with cable latch turned to ETH works OK with camera (black l...

Forum po polsku jest zdecydowanie potrzebne. Żeby nie mnożyć martwych na ogół forów byłoby wskazane, aby uczestnicy tego forum nie tworzyli własnych, a wszystkich którzy chcą to zrobić kierowali na forum portalu raspberry.pi.