FreePBX Firewall interface won't stick in the zone

I am getting strange behavior with FreePBX firewall. I have a Dashboard error that a “New Interface is Detected”. Going into Connectivity/Firewall/Zones, I find that the Interface is “trusted”. I select “Internal” and click the check box. The error on the Dashboard does not go away, and on the next reboot the interface with be in the Trusted zone again.

This is on an old piece of hardware that has both a wired port and a wireless port. My wired port works fine. This is on a wireless port (wlan0) that is not connected and has no IP address. I am running FreePBX x64 version 13.66-6, and the firewall module is updated to