You don't lock thing with the TGP, you track things. Just so we don't have any confusions here.
The TGP will try to track what's inside the box when you're in Point mode. When you zoom out, you increase the size of the box. So the moving target you track is smaller, and the TGP software get a much harder task to find out what to track.
Look at TGP videos from YT, at least the newer pods auto detects the size of the moving objects and adjust the size of the box so it's fits perfectly around the moving object. That's not implemented in our pod.
And don't mask the pod when you're in point mode, if you see an M in the lower part, you are masked. And only use point for moving targets, use area for stationary targets.