Not sure about Go. I use Go 4 now (for my Phantom 4), and it may be that Go on your P3 may have the same behavior as Go 4 on the P4s.
Last time I checked the Orbit mode in Go4, it did not lock to a point of interest (POI). That meant that if you raise or lower the drone height while orbiting, you had to manually and continually adjust camera tilt if you want to stay on the same point. But Litchi has a point of interest marker that keeps the camera tilted to the the target.