LG G Stylo WiFi won't turn off. This seems to have started after updating to Marshmallow.

When I go to settings and turn off WiFi it turns itself back on (the off button seems to be grayed out). From the quick settings area the WiFi icon is not illuminated but WiFi is still on and tapping it does nothing. When I re-boot the phone it works only once after the re-boot then goes back to the same problem. With WiFi always on it drains the battery really fast. Any help with this would be appreciated.