Vuforia - android issue

I have set up a project using the mid air feature. When I build to an ipad (ios device) the object augments and I can move close to the object. The issue is that when I build the same project to an android device (google pixel 2), I can't zoom into the object. When I build to the android device, the distance between the camera and object remains constant. I am not able to zoom, but I need to be able to zoom in. Does anyone know why this may be?