Non-volatile store while +CFUN=7 or +CFUN=9

Issuing the &W command while in +CFUN=7 or +CFUN=9 modes will result in blocking access to the command parser from all interfaces (USB and serial) after a power cycle.
The radio vendor has confirmed that &W should not be issued when the module is in either of these power save modes.

The only known method of recovery is to re-flash the firmware.