It appears there a re significant problems with R700 5 GHz radio that have existed in code base since 9.8 was released and they continue or are even worse in 9.8.2. The radios rebooted, background scanning / channelfly doesn't work and now my clients just mysteriously drop off. For now I have disabled the 5 GHz radios on R700 to get reliable coverage which means I don't have 802.11ac of course. This is happening on all sort of devices. Has anyone else seen similar issues? I will open a case when I can troubleshoot it and not disturb clients.