Wall mounted dimmer always on (CC2652R ZZH)

[Cyroq]

I use a ZZH Zigbee stick with Zigbee2mqtt and successfully paired a wall mounted light dimmer (Eco-dim.07). It shows up in Domoticz and the level set is working. However, the device is always on. I can turn it off but the status stays 'on'. This means I can't set the device to 'on' since Domoticz assumes the device is on already (changing the level to force the dimmer to 'on' is a workaround, but not a solution).
I see a Zigbee device called 'state' that functions as a smart socket in Domoticz, but this means I have two devices for one light: one to control the level and one to switch it on and off. Is there a way to combine the two in one device? Because this isn't quite user-friendly.