Ionic Screen Scale (e.g. Google Maps Grid Issue)

On some devices the screen is scaled. I don’t know why, but ionic does not use the native resolution.
You can see this issue on google maps. I have a dark background and the google tiles are drawn smoothly. So, on other screen scales as 100% you can see a grid. Because the background shines through. How to fix that? Is there a option in ionic or cordova? Or how to disable the smooth drawing?