I was trying to figure out why one of my bulbs was turning on randomly. I had forgotten that I had enabled vacation mode. It would be helpful if there was an indicator on the main device’s screen that showed if a bulb was in vacation mode, otherwise you have to click into each bulb separately to determine this.
I had the same experience this week after returning from vacation when my bedroom light turned on at 100% brightness . On the plus side it’s more effective at waking me up than my alarm