Event.latLng latitude information is abnormal when polyline mouseover in Google Maps API

If you use the code below to make the map an aerial photograph, there is no problem with longitude from Zoom, which is 45 degrees diagonally, not directly above, but the latitude is greatly shifted to the north, which is a problem.In the case of ROADMAP other than aerial photographs, there is no abnormality.

Google.maps.event.addListener(polyline, 'mouseover', function(event){
   console.log(event.latLng.lat()+", "+event.latLng.lng());
});