This had nothing to do with any kind of electronic interference...
Instead it was likely the weather conditions that first caused the "low vertical limit landings" due to iced up VPS sensors & then later the motor errors together with loss of...
Well, I am from the USA and I see no code or even a hint in that article and letter that causes me to be afraid. And it's absurd and condescending to say that anyone from another country is incapable of reading and understanding it.
The letter...
I agree that the VPS system "seeing" the fog or cloud was the issue.
Here's an interesting question about that sort of situation. What happens if you hold the left stick full back and allow the drone to enter the landing mode and descend into...