No state change event on colour / brightness adjustment

Configuration
1

I am using Ikea Tradfri bulbs with Zigbee2MQTT. If I adjust the colour or brightness I don’t get a state change event. If I turn it on / off - I get a state change event.

I can see Z2M is publishing the new state on colour / brightness changes so I’d expect to see the relevant events.

Is this a bug somewhere, or am I doing something wrong?

Thanks