Ive noticed that changes to the "camera field of view" cause a shift in the POV. (point of view/camera location)

As a photographer, ive been doing some virtual studio building to determine a few set-ups for teaching purposes.
Ive noticed that various elements do shift in relation to each other when varying the field of view of the camera.
It looks like the location of the camera is shifting when camera-FOV is changed.

Indicates some error in the maths that renders the new viewpoint.
Has anyone else noticed this error?

(Actual elements dont change in relation to each other, but the cameras perspective is wrong and not to be trusted as representative of real world field of view)