Got some iOS devices with iOS 8.3, public beta 8.4 and one iPad with beta 9.0, AC-87U with 3.0.0.4.378_5134. In a few days after installing iOS 9 periodical full hang-ups of QAntenna started: no 5GHz access point available, no wired connection on port 1 (if all LEDs were switched off, port 1 LED starts blinking). Resetting router helps until the next hang-up in 1-2 days.
Didn't associate it with installing iOS9 first, but eventually recalled it, and after moving iPad to the 2.4 GHz band...
AC87 5GHz + iOS9 weird behaviour
Didn't associate it with installing iOS9 first, but eventually recalled it, and after moving iPad to the 2.4 GHz band...
AC87 5GHz + iOS9 weird behaviour