Recently got a P3P. Flown 70+ flights and > 82km. Had a strange "compass error" 3 days ago and had to recalibrate compass several times to get it to go away. Next flight, aircraft was "unstable", similar to what happened when I flew it close by a vehicle some time back. On landing, it tilted fwd and clipped the front left black prop. No visible damage at all to prop or arm, motor etc, was at low speed. Had several other flights, no problem. Then started to get ESC error message. Sometimes, taking battery out and re-inserting, resolved issue. Other times not! Tried several times other night indoors with no props on, no luck.... Next ,morning, started up just fine and did several flights, no issue!! Today, several good flights, then error started again. If the ESC is damaged, surely it would be permanent? All latest firmware updates have been done.... Any ideas? Hoping bobmyers or alokbhargava can comment as they seem to contribute to numerous posts on this topic.