Hi @ jpmitchell
I am unsure if you are aware of the articles below, feel free to take a look as these covers most of the issues.
Also, may I ask did you select the grid mission? If it was in a grid mission, would you try another mission type and let us know how it goes? I found a similar issue over here. My Drone DJI Phantom 4 Pro V2 only Hover approximately 3 meters.
Best,
Rosana