Mission Planner hangs on "Getting params" when connecting throught TBS Crossfire Bluetooth Mavlink

I have a similar but not identical problem with a Skydroid M12L transmitter which has Bluetooth and USB connectivity to a PC. I’m running Mission Planner. If you look at the Stats while connected, you will likely see many dropped packets. This thread that I started about my issue may be a little help: Errors uploading missions.

I have not solved my issue either.