I installed 2 color bulbs about a week ago. They initially worked fine. Now they have started turning on by themselves and changing colors on their own, sometimes quite rapidly.
I have no rules setup, no automations, and my app appears to be up to date.
Are you able to suggest a fix?
Welcome to the community @kcoerr
What I would try is pairing the bulbs again. you can leave them connected or delete them from your app. Since you do not have any rules or automations you can try either one of those. If you had rules and automatons, I would recommend not removing the bulbs from the app.
Here is a link to perform a factory reset of the bulbs:
Note, if they are in a lamp, might be easier to unplug the lamp 3 times.