I have noticed and reproduced the problem, in my original app I have created a state called Location with LatLng data type, when the page loads the state get updated with device current location from global properties. But instead of actual value its updated to 0,0. I also have tried getting the location on the GoogleMaps widget, it's not working, then I tried to reproduce in a test app, the same problem continues.
P.S. I have already set the permission messages.
Please check and let me know if this is a bug.