Device states not updating

[Cyroq]

Hello there! I installed a Zigbee dimmer and succesfully added the light to my Domoticz Devices. I can control the light from Domoticz (desktop browser), but the device state is not updatet: when I refresh the page the light is shown as Off. In the app I can't control the light because it doesn't recognize it's set to On and therefor the level slider doesn't show up. Also, there is not log available for this device.
I'm very new to Zigbee2MQTT, how I can get the device state updates working? I couldn't find any documentation on this.

EDIT: after I restarted the zigbee2mqtt service in the command line the level state seems to work fine. However, the state of the light being on or off is not updating.