So i was trying to fly my P2 over a ditch at a very low altitude for a cool shot. I had it very steady and while it was just hovering maybe 3-6 inches off the surface of the water, when all of the sudden it quickly dunked into the water by itself. I still had control when it did that so the dunk was only like half a second. Only the landing gear got wet, but since i have the newest P2 there was the compass enclosed in a tight casing, but on the opposite end there is a very exposed black chip. The next day I was showing my grandpa the failsafe feature. The phantom worked fine but once it automatically flew back, it descended very hard and flew in circles while scraping the landing gear along the ground, and it almost hit my grandpa. What is that black chip, and did it have anything to do with the malfunction?