I have flown a q500 for 2 years without any issues . So i bought a h model and the first flight was rocky from beginning i took it up check camera views and wouldnt stay in one spot keep drifting away from me so i brought it back above me about 15 feet up hit home like normal and it took off to my right and crashed into a building about 30 feet away Broke all the props and detached the camera wires. Any ideas how this could of happened ? also wont the avoidance system work ? Im feeling bad bue have no idea what i did wrong>