AIS format Waypoint sentence generation not working

[KLyvers]

I configured Direwolf to generate and output NMEA sentences for use on my chartplotter. When I configure it for 'N' (generic NMEA) it works exactly as expected sending waypoints.

However when I configure 'A' nothing is generated/sent, either via the console (with '-dw') or the actual serial interface.

Version is 1.7 compiled from Master branch at the start of this project two days ago. Please let me know if there is any additional diagnostic information I can provide. Thanks in advance!