Defaulting lights & light profile - how?

Hey all, picking up on this thread for visibility.
I have posted a similar question here: How to set a value for "customized" Color Power On Behavior in Zigbee2MQTT? - #5 by elzorro

The problem I’m experiencing is how to set a default color for power-up (as oppose to the HA turn on service).
I managed to set default colors for the turn-on service but it always goes back to the initial color when powering up.

Any thoughts?