MQTT light resets state after a few seconds

[tall sinew]

This example message gets sent from my MQTT light after I set it this way using the UI:
{
"state":"ON",
"color":{
"r":0,
"g":0,
"b":0,
"c":212,
"w":0
},
"brightness":4095,
"effect":"Solid"
}
The light updates and everything works well, including the brightness which stays at the correct value. However after approximately 3 seconds the state inside the UI jumps back to 50 for cold white brightness, 50 for warm white brightness and 50 for colour brightness. It does the same when I ask for RGB colour values. No other messages are being sent on any other MQTT channel. Does anyone know what could cause this behaviour?

[neat cosmos]

I guess HA isn't recognizing that state update, and after changing the light when the entity state doesn't change, it reverts back to previous value, assuming the update failed.

What are the light entity attributes before and after you change the value in UI?

I thought I saw someone recently asking something about 10-bit brightness, which I wasn't aware if we supported. Was that you?

[tall sinew]

That was me

[tall sinew]

Interesting, My state message looks like this:
{
"state":"ON",
"color":{
"r":255,
"g":2,
"b":44,
"c": 0,
"w":0
},
"brightness":4095,
"effect":"Solid"
}

[tall sinew]

entitiy states says: "rgbww_color: null"

And brightness: 255

Let me try removing that scaler

[tall sinew]

This message doesn't seem to update the light

[tall sinew]

Correction, this message only updates the brightness

Removing brightness scale has no effect

Changing to RGB color mode and removing "c" and "w" keys has no effect