Thanks for swinging by the DroneDeploy Forum. I'm sorry to hear that you are having issues flying your Phantom 3 Standard with our flight app.
Unfortunately, DroneDeploy flight app does not longer support autonomous flights for the Phantom 3 Standard. DJI does not support this type of drone with their SDK firmware updates and it has been causing a lot of issues for us to support it as well since we rely on their SDK to work. As a result, and for safety reasons, we deprecated the Phantom 3 Standard series half a year ago. That may explain why you are encountering some issues with our flight app.
We strongly recommend using one of the drones best supported by both DroneDeploy and the DJI SDK for a better mapping experience. Please review the list of supported drones here.
I hope this information is helpful. Have a wonderful day!