Had a very similar situation on the same day as you. After the previous flight being a near disaster with lost gps over water ( story here
) , I purchased a trackimo, fitted new props, and went out for a test flight in my cul-de-sac. Wifi sniffer shows no channel 1 interference (my drone chooses channel 1) and I do ALL calibrations, pre-flight, take off and generally stay under 75 feet alt and within 150 feet, being very cautious since I still have suspicions that the firmware upgrade to 1.51 has some bugs. Get through 1 battery's worth of flight on sport mode. Let it sit for a few minutes, do another compass calibration and start flying, again, really cautious. About 9 minutes in, recording all of it, I have the drone descending from about 60 feet to 30, directly in the middle of my cul-de-sac, when Karma just loses power and begins to spin, dropping straight to the pavement unpowered from 30 feet, striking battery compartment first, shattering all props and popping all the led covers off the arms. Interestingly enough, the video, which I will post later, quit before impact having shown the first few spins but no crash. I'm ready to be done with this thing.