I recently experienced a flyaway due to a bad GPS home position (my mistake, I forgot to enable circular geo fence preventing arming without reliable 3D fix).
But, during that flight, I landed and rearmed. At that time 3D fix wad good, is it normal a new home position wasn’t recorded ?
The flight log can be found at https://drive.google.com/open?id=0ByipkHiiI39KS2FsRnozZkZrdzA
My setup is quite simple :
F450 frame, AUAV-X2, X2212-980kv, 10x4.5 prop, 4S/3300, NEO 8M