No cards in the morning on AnkiDroid

Hi there!
I’m new to Anki and very happy with the programme. There is just one thing that doesn’t work: When I want to study my cards on AnkiDroid in the morning, they don’t show up. They will show up sometime in the afternoon. On my Anki Desktop version meanwhile, they already show up in the morning.
I don’t know why there would be a difference between the two versions. There is no differnece if I synch the cards.
In both the Desktop version and AnkiDroid I have 2 hours after midnight in the “next day will start”-box.
Maybe you can help me?

Are you up to date?

Version 2.15.0 (20210524)

Yes, I use the 2.15.4 version

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