Hello all, This past weekend I crashed my Phantom 3 adv about 8 ft off the ground while I wasn't paying attention. After replacing the props, re calibrating the IMU, gimbal, and the compass, the phantom does not take off properly when it is in P-GPS mode. When I initially apply throttle the unit immediately flips over on its backside, very frustrating. I am able to take off fine when in ATT mode. And once in the air, I am able to switch to the P-GPS mode with no problem and land the unit in that mode as well. Any suggestions why this would be happening and how to correct it.. Thanks in advance.