I have a weird problem where my Cinestar 8 sometimes goes crazy when in Dynamic Position Hold. It just seems to want to go off and fly somewhere like a mad machine. This is actually quite dramatic and the further it tries to fly away the faster it goes. I have looked at the GPX data and I'm no expert but it doesn't seem to look right as far as GPS stick input is concerned. I need an expert to take a look and advise please. It does this quite often and this is just a typical example. File is attached.