Has anyone had an issue of the props coming into contact with drone during flight? Mine will make a buzzing sound and the drone will twitch downward on the corner where contact is being made. This is my first drone and I like it alot but this seems to be a major issue. I have had little over a week and no crashes at all, but this problem has come up and seems to be worsening. I have changed props twice now and the problem persists. Anyone else have this happen or any advice. Dji wants me to send it back but itll rake 2 weeks, not thrilled about that right after i bought it. Thanks