So I bought a used Mambo a couple months ago and I love this drone, but I'm having issues with ascending and descending on it's own. Usually right after take off it goes up then tries to go down and once I get it about eye height it keeps climbing. I don't think it's the remote stuck in any position. I blew on the sensor and wiped down the camera to make sure no dust or anything is in there. When I do get it flying normal once in a while when I do a flip it will flip and descend to the ground. I thought it might be the sensor and being indoors, but it's happened outside as well. I'm not sure what else to check. I just wanted to see if anyone else has experienced or heard of this and has a fix or a reason?