AC68u and iOS Devices

I have a Linksys WRT 1900ac and Asus RT ac3200 routers. Since I was unsuccessful to get the AC3200 router to operate smoothly with my iOS devices, I switched back to WRT router. I don't have a single problem with the WRT router and iOS devices. I like the built in features that come with the Asus routers. I would like to go back to using the Asus router.

The original problem that I was having while using the AC3200 router was this, frequently, I was getting STOPPED (err = -3295)...

AC68u and iOS Devices