A few weeks ago I was flying with my mavic in sport mode, a few hundred feet in the air with plenty of satellites. When I "floored" it, it shot forward like normal, but a few seconds later I could hear it automatically climbing in the air, hearing the change in pitch from below. From 300ft it shot up to 350ft in about 10 seconds, on it's own.
I thought the problem would go away when I landed it, but tonight the same thing happened when I took it out for a spin.
The drone works perfectly in P and T mode. I had a minor crash about a month ago, with no exterior damage to the props, camera or arms, but I can't figure out why there's only a problem in sports mode. There are no displayed errors in the app.
What should I do?