WPA-Enterprise WIFI dropping after IOS 6 Upgrade

We use WPA-Enterprise authentication for our WIFI and since upgrading to IOS 6 the connection needs to be reautenticated everytime the iPad is unlocked.  This is a major inconveience.  With IOS 5 you only autenticated one time and whenever you unlocked your iPad you were already connected.
These are the required settings which IOS 6 still automatically navigates, but it doesn't maintain the login name and password (which autheticates to a RADIUS server):
Network Authentication: WPA-Enterprise
Data Encryption: AES or TKIP
EAP method: PEAP
Inner EAP method: MS-CHAP v2
Check Use Windows user name and password
Uncheck Validate Server certificate

It is forgetting the network everytime the iPad sleeps - even when it doesn't require an unlock passwod.

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