10 seconds??
Nope, I did my own research because everybody says something different...
The ONLY thing you have to do is start straight up, you don't need to hover! Just climb up, max 50% speed, and when you reached, let's say, about 10 feet, just fly away. I tested it many times, it always worked!
If I started the drone and move up and forward immediately, the drone had no chance to see where its starting, kinda obvious right?!
So just start in a "relaxed" way straight up and you are fine. Hovering for many seconds is a waste of time