iphone 15 wireless charging no longer possible

I noticed that all of a sudden, my iPhone 15 pro max stopped charging wirelessly.

When I put the iPhone on my charger, the lightning symbol appears on the phone indicating that it is charging. But the battery level does nog increase.

On another wireless charger, nothing happens at all.

In the battery screen, you can see that the phone was on the wireless charger from 00 until 09. The charging symbol is displayed but the battery level does not increase. When I,plug in the usb c, the phone charges as expected.