In the helix Viewport overlay by default you have both the camera information and the coordinate system in the lower left corner.
I think you should move the camera information to the top left corner, and move the title to the top center, so that none of the overlays, overlap each other.
Customer support service by UserEcho
I think the reason for this is the camera has a target. So its zooms in and out from a target. When you get close to a target it stops. I seem to remember a walk around mode.