I have controller C35 with with AP's 3705I and 3825i, diferents SSID ́s (Internal Portal, Mac Authentication, Etc) with version 10.31.05.0003,
But now when the clients had been conected for mac authentication after a while the clients have been disconected and when they try connect for mac authentication this not works, if see the network options on device do not get an IP, but if you try to connect to internal portal or another ssid it works, and then they trying connect to ssid with mac authentication it works.