After GPS was lost, GoPro Karma (updated to latest V1.5 firmware) started flying full speed in a random direction. After the crash, I sent GoPro the flight logs and was subsequently asked to send in my GoPro Karma drone in exchange for a full replacement. I was very fortunate that I did not hit anyone or anything. The fact that I was asked to send in my GoPro drone for a replacement suggests that there is a fatal flaw in their software which needs to be fixed.
FWIW, there was a DJI Phantom 4 flying next to me with no problems whatsoever.
Original on Youtube