Kelvin loses lights after a while

[Ben Macphail]

I have Kelvin set up on a Raspberry Pi 3B controlling a set of four Phillips White Ambiance bulbs. I have it set to activate when I toggle a specific scene.

After a while, I'll notice one or more of my bulbs is no longer synchronized with the others, and I have to re-select the scene to get Kelvin to start adjusting it again.

Any help fixing this would be much appreciated!