My signal is good and bad in my small town, and wifi can go off on its own and turn on when I open to my home page after a minute "maybe". A lot of times I turn it on when my auto on doesn't take.
Under the circumstances there may not be a fix. I have a customer in a high security building where I lose the signal inside and sometimes it doesn't automatically come back when I step outside, as you would think it should. If I drive far enough away and wait log enough it will come back but I usually just force it,