I have a P2 GP FPV iOSD GS. On my last 2 flights, I gave experienced a loss of pitch control (altitude) at the end of the flight. No problems during takeoff and mid flight. But upon hitting my first battery warning (20%) and bringing the P2 down for capture ( I use the grab in flight method of landing) the left stick seems to have no authority. The P2 will be at around 6-8 ft and I give it full up throttle and very little happens. It does arrest a shallow decent but not much else. I have not crashed yet but this seems to be a problem. Anyone had this happened before? Could it be my recent addition of the ground station?