Disabling randomized macs on Android 11

Trying to set up a new Moto-G Stylus with Android 11 on an internal wifi network with mac authentication and a hidden ssid. To provide the expected mac, I selected "Use device MAC" (which is correctly displayed in the connection setup), but the phone continues to send random values. No problem connecting when mac authentication was temporarily disabled on the AP. Repeated forget/re-entering the AP info and resets of the Android networking haven't changed the random behavior. Seems like a bug where the "Use device MAC" is simply being ignored. The phone will be useless without a fix and I can't think of anything else to try. Any suggestions or workarounds would be greatly appreciated. Thanks, -Tom