Note, best watched full screen:
Hermione starts to the right of the video; the yellow frisbee (upper left) identifies the first GPS waypoint she is to reach, the red one (lower left) the second and last where she should land. And she was doing so well right until she reached the first waypoint and flipped over, left mowing the park grass!
Best guess, main battery was running low, she clipped the ground, and flipped. No real damage done; she’s just outside at the moment drying, so I can brush the grass cuttings off her!