@herf It varies from a few times a day, and up to a few minutes apart.
I have been making changes to the network, but all on same net now with fixed ip.
Still quite often, so does not seem to be dhcp or routing related.
Turned off all automations in apps. Not using wall dimmers etc.
I did turn the lights down using the app about an hour ago, and have seen 3 notifications since, but none in the hours before using the app. - so probably like you say, its slowly undoing the change I made manually.
Changed to fast gaming transition now, and turned the lights all the way down in app. About 10% up again after 5 mins, but no notification yet.
Does seem a bit random when it displays :)
Actually, with the option checked to Back of flux when making app changes I expected flux to leave the lights alone for longer. Until the sun is up preferably ;)