okay so strange problem today

[hjscm]

was testing out a new vtx. i have failsafe to go home and land. went into fail safe and started coming home. regained control and took it out of fail safe. happened 3 times while out far testing vtx. last time went into failsafe and said land. had 65% battery left. luckily i saw the video of where it was landing so took about an hour and found it. just wondering why it went into land mode. hooked up to computer and fails safe was set to go home and land. this was not a good thing to happen and luckily it missed a lake by about 60'