Just back from hols I was interested to read that Eagle14 after an update had got his P4 FM to work. (any chance of a screen video). I had been running the latest update for 4 weeks without any luck. So without any new updates I tried again. See the posted video.
Yes I'm on 2.8.0 although I think I've seen 2.8.01. Is there a later version than 2.8.0?The FM only half works. No controll with the right stick, left, right, backwards and forwards.
Sorry, I used "Dashware" (free) with the telemetry found in DJI/dji.pilot/FlightRecord. Then convert the file to .txt using https://healthydrones.com/main?flight=last. I hope this was of help.