After marshmallow update, I cannot download app updates in the play store while on WiFi. It just says "downloading" but never starts. Works fine if I turn off WiFi and use my data. Also my YouTube will not play video on wifi,it says "connection to server lost". My Internet works fine on wifi other than the play store and you tube. Things I have tried: -Turning router off for a few -restarting phone -Toggling airplane mode and bluetooth off and on -clearing partitions -trying another wifi source (same problem, it's my phone, not router) Any other ideas?