I was having this issue with IOS devices as well. Drop/Connect. Standing up a new SSID was the only workaround for me. TAC is also looking at my Monitored Capture Logs and I am waiting to hear back. But in the mean time I made a change on one of my original SSIDs that everyone was using until the issue started. I enabled the 802.11w option in the Encryption Mode section and the individuals who could not connect using that SSID connected immediately!!   Now, I'm going to leave this in place for now and see how it goes. ... View more