Jung wall switch stops working within 24 hours

Hi, I’m using phoscon/deconz in docker:
Version 2.19.01 / 19/09/2022
Firmware 26680700

and my jung wall switch stops working within a day and shows up as unavailable/greyed-out in phoscon app.
I can reconnect the device by pressing buttons I and 5 simultaniously,
and then the device works for a few hours, but it’s gone the next day. No button presses are detected any more (also not via homeassistant event listener) and the device is greyed out again.
Any tips?

For refference, I also have a other swithes (philips tap, xiaomi round switch, philips dimmer switch, tradfri on/off and they never fail)