Pixy isn't following the Flightpath
Pixy can take a couple of seconds after it takes off to adjust to the conditions before it sets off on its flightpath. Make sure you stay in shot as Pixy will look to you for navigation.
Please also follow the Best Practices guide.
If Pixy lands suddenly and you want more information about the flight, check your notifications.
Orbit and Reveal are designed to come back to you. The green LED will turn on when it is ready to land and then place your hand under Pixy. If you put your hand under while the white LEDs are blinking, the sensor to detect distance to the ground will make Pixy rise higher in the air. Hover and Follow are designed to fly with you. You can put your hand under at any time and it will land in your hand.
Pixy uses you as part of its navigation, so some lighting conditions (like moving from shade to brightly lit areas, or when the sun is directly facing Pixy) may cause Pixy to lose tracking and stop following you.