Toggling a colored light on from dashboard does not send "power on"

Background: I would like to be able to set up my colored lights prior to turning them on, so have disabled the appropriate setting in tasmota for that particular light (setoption20). Unfortunately when I use the control on home assistants dashboard to toggle on, the light is being sent a “dimmer” command rather than a “power on” command. Result is the light doesn’t turn on.

I have done some sleuthing and realised this is dictated from the MQTT discovery. Can I overwrite this setting in my home assistant config?

Fixed this. Powered off device from mains power, deleted device from MQTT via home assist and re powered. Assume this changed the MQTT discovery.