Been using mission planner for several years now and have connnected to Pixhawk 1 thousands of times with various telemetry radios and USB connections.
Recently, when I try to connect with USB or telemetry the paramters load normally until VISO_ORIENT and then stop loading at STAT_RUNTIME. I just let it wait at STAT_RUNTIME for 7 minutes to see if it would progress. It didn’t.
The good news is when you hit cancel, the drone is connnected to the laptop.
Reads and writes to the flight controller are normal.
I am using MP 1.3.52, which I think is the most recent release.