Lately we have been noticed that sometimes after we make a change to anything related to an SSID on an IAP the Auth server for that SSID will revert from a RADIUS server to Internal Server.
For example for our Guest SSID i was changing our captive portal address to host name instead of IP and changing the port from 80 to 443. When i hit finished the Auth Server1 server was changed to Internal.
So far it has happened on 115s and 205s running 6.5.4.2. Before i call TAC and they obligitory tell me to upgrade the firmware. I wanted to see if anyone else has seen this before.