So far you are just making guesses that might be completely unrelated to the incident.I wasnt comfortable about 10 gps so i waited for 15. Which btw, took a lot long time.
This particular place was slow in gps and the entire flight of only like 100-200 meters distance of 30-50 meters height had a total of 17 gps. It would go up/down to 15 gps on some parts usually close to the power line.
If you do want to find out what happened, Post #8 shows you how.