I have a WLC (4402) running version 5.2.193.0.  The WLC used to have both interfaces connected to a single switch (LAG was enabled) with etherchannel on the switch end.  It was changed such that each port on the WLC is connected to a different switch (for protection against switch failure).  After I made the configuration changes, I tested by disconnecting port 1 of the WLC from the network.  I had a wireless client performing a continuous ping on the network.  When I disconnected the cable from port 1, the ping continued uninterrupted (which is what I expected).  When I looked at the WLC, the APs had switched over to port 2.  However, when I plugged the cable back into port 1, the wireless client could no longer access the network and was unable to access the network again until after I did a manual repair on the wireless adapter.  I did not expect that.  Any thoughts on why this happened?

For reference, I've attached a partial config output from the WLC (with any identifying info stripped out).