mobile

I'm trying to figure out if my Edge is bad. When I turn the screen off, and come back to the phone a few minutes later, I'll get a notification stating it has connnected to my router. I've checked the settings and it states the wifi is set to be always on. I attempted a factory reset and still no luck. Sometimes it'll take a few moments before it even connects to the wifi again upon turning the screen on.

Do I have a bad phone?