Using GoogleMap in an Ionic application

We have webix controls integrated into an Ionic application. Adding in a google map, if I test it in ionic serve (using the browser) it runs as expected. If I compile it down and test it in iOS emulator, the map will not load.

Are there limitations for using the GoogleMap component in a compiled app?

If anyone finds this and needs a solution, set the src for loading the API. It is referenced in the section Using custom map source:
https://docs.webix.com/desktop__googlemap.html

The problem is that Ionic is executing locally, so its trying to load via file://maps.google… which obviously doesnt work. Setting the source to https://maps.google.com/maps/api/js fixed the problem.