Lights cause GPS issue??

[Dronebow]

DJI tell you not to calibrate your Mavic’s compass anywhere near ferromagnetic material. This even includes your mobile phone which will contain tiny amounts, no money in your pocket, even a belt buckle will cause problems. So I’m not surprised that a calibration on a rebarred concrete structure caused problems. Read page 54 of the manual!

I know this and have known it since my Phantom days. The Mavic has been much more resilient and I’ve never had any issues on any surface. But in this instance I’m sure it was the lights. I had already flown from the same surface without the lights and it was fine.