Aquara WSDCGQ11LM displays data in zigbee2mqtt but not in HA

I recently bought 3 Aquara WSDCGQ11LM climate sensors.
One paired ok and works fine.
The second paired ok but shows nonsense data in zigbee2mqtt and homeassistant (constant temp and humidity no matter where it is places) - probably broken.

The third one paired ok and shows plausible data in zigbee2mqtt but no values in homeassistant.

Can anybody suggest how to solve this problem. I have included screenshots of the sensor 3-problem.

And here is the zigbee2mqtt-display

I think I found the problem:

Sensors work fine and display in HA is fine until I rename device to something containing an Umlaut (“KÜ Klimasensor”) change device name in HA ist checked.

When I rename device w/o an Umlaut ("KU Klimasensor) everything works find.