Hi , I have a new Phantom 3 std ( 2nd one) and it has weak signal and it keeps having compass error. It will fly fine for a while , then compass error again. I also notice when it is hovering it doesn't stay put like my other one did?? I have calibrated it every time I fly and keep it pretty close to home for now. I am upgrading the RC on Wednesday and I would like to make sure the compass error is not an issue...Any thoughts?