Cambium tech's were able to verify this issue with my radio and a bug fix is scheduled for 16.1.
The current work around to use 15/20MHz channels is as follows:
- Change the Center Frequency to a valid frequency for the Ch BW you are going to select. Do not change the Ch BW at this point.
- Save the config and reboot the radio.
- Once the radio is up, now change the Ch BW to the desired value.
- Save the config and reboot the radio.