LED on Paulmann 500.48 flashes briefly

I recently switched from FHEM/DECONZ to Homeassistant with Zigbee2mqtt. I have reprogrammed all devices.
Now I have a problem with my Paulmann 500.48. The connected LED bar flashes at regular intervals of several minutes.
When it’s on, it turns off for a second, and when it’s off, it turns on for a second. As a switch I use a Xiaomi WXKG11LM.
Can you help me and give me a tip what could be the reason?
Thanks.

I think it’s a bug in Zigbee2mqtt. I have the same problem with my Paulmann lights since a recent update.

Maybe you can chime in on: Paulman 371000001 light flashing · Issue #14735 · Koenkk/zigbee2mqtt · GitHub