Hi - I am wondering if anyone has experienced a sudden nosedive as the phantom motors are spinning up when given throttle and getting ready to take off? I have had this happen to me several times so far, and I thought it was because of added gimbal. But it just happened again and it was completely unloaded. Not sure what is going on or what I can do to correct it? The firmware is upgraded to V3.0 I believe and its a P1.1.1 and using standard vision props.