Smart bulb reporting state after power loss

Just noticed that my smart bulb is still reporting on/off status even when powered off from a dumb switch. Maybe its always done that but Very cool!

I dont know if its the bulb sending out 1 final signal after detecting power loss (unlikely) or the hub has some sort of logic now that checks for the connection of the bulb?

https://photos.app.goo.gl/RBQBdZiqajD7d3sE2

It probably has something to do with Device Health, Ive never had it on in the past but it has magically enabled itself recently.