One option would be this workaround.
{{parseFloat(get_project_latitude.data?.latitude) || 0}} and then you can try replacing the zero with the hard coded coordinates you want.
More details about a user with a similar issue here hopefully it helps.
Also under Appearance set Zoom to a higher number. My maps also start zoomed out until I increased the zoom number, not much more I can do besides adding a feature request for fixed load in zoom on hard coded lat/long.