Airport extreme ac can't load Facebook app contents

I have the latest airport extreme for a few months, for some reason I don't know why its having trouble to load my facebook app content i.e. news feed, recent post, pictures etc it doesn't load sometime (4-5 times a day) I need to turn my iPhone/iPad wifi on/off to have it work again. We have 3 iPhone 5s and 2 iPad connected to the airport extreme, other then the facebook app all other apps have no problem. When I connect my iPhone to another wifi and it can load the facebook app content without any issue. It also work with LTE. I've already tried factory reset many time and updated to the latest firmware.