Hello Emlid. My Navio+ was working fine on Arducopter 3.6.11, i just flashed another SD card with new image, now my FRSKY receiver is not seen on radio page, it just does not reconise the receiver on PPM mode, i have the same wiring same everything just new SD card, if i swap card with the previous image it works fine.
I have had this same issue before and you guys fixed it, i think it is easier now.
Raspberry 3B
NAVIO+