Hello all. I just bought a Mavic Pro last week and really enjoyed flying it. However, I was flying the other day about 20 feet from me under a large oak tree. I was bring it down for a landing on a patch of walkway under the tree. The drone suddenly lost signal and quickly ascended into the tree and crashed. I am curious if this was a user error, and if so what I could of done to drop this from occurring. However, if it was not my fault, what should I do to get it fixed. Thanks for any replies. John