Sometimes my P2V+ just flips upside down for no apparent reason. I have her on film twice doing it. Once was right at the start of RTH activation. I lost line of sight and didn't even know she did it till i saw the film. The second time in that flight was when coming down to land. she dropped a good 100 feet. no prop wash. i was moving forward with a little descent. is anyone else having this problem. I'll post the film when it's done uploading to youtube.