No GPS - even though serial pass through showing NMEA messages

I am trying to connect a Waveshare (Quectel) GPS LC29H to the GPS port of a CrossFlight.

When I setup a serial pass from Serial port 3 (GPS) to serial port 0 (USB) the NMEA messages are coming through. But yet when terminate the serial pass and directly connect LC29H to GPS port I am getting a message “No GPS” on Mission planner

Any suggestions?

Bill