[Q] Wifi Always allow scanning turns on automatically and shows in battery usage

Hi guys

I noticed countless times that randomly when turning on wifi and then turning it off, the "always allow scanning" under advanced options is ticked.
I noticed this because then under battery usage you will see wifi active even tho main switch is off and 99% of the time that is why.

Is it a lollipop 5.0 bug or is it some of my apps that can switch that option when they detect wifi has been activated?

Also, it seems that if i dont turn on wifi in the first place, that option never becomes active. Battery life is very good on my phone so not a deal breaker....

Anyone knows?
Thanks