XBee telemetry setup

Has anyone had experience setting up Pixhawk telemetry using XBee?

I’m trying to get two XBee ZigBee S2C to communicate between the QGC side (Windows, USB interface) and Pixhawk side (Telem1) using the transparent serial mode. I’ve followed to online guides and am using control flow, but the connection drops very frequently. I’ve confirmed data is being received on the QGC side using the XCTU configurator, but QGC just can’t hold the connection.

Does anyone have any suggestions?