I took off from the roof of my car some 100 feet away as the road was on a slope and this was the most level option. I didn't notice home point being updated during flight.
Welcome to the forum Johny. I'm Allen, the guy who suggested you join here and have your flight logs analyzed.
I can tell you from decades of experience both flying and instructing, there are times when we "move the sticks" and in our minds we are 100% positive it's not how it happened. If the Flight Log indicates stick movement, what-so-ever, you can pretty much take that to the bank as gospel. Maybe you didn't intend or even realize it but somehow the stick was moved. In Sport Mode, close to several obstacles, and probably a bit nervous is a recipe for "bent/broken" drones for all but the best of us.
Hopefully you get it flying again and do some practicing in Sport Mode well clear of any obstacles.