Draw a Polyline over street names in react-native-maps

Question

I'm using react-native-maps to draw a bunch of Polylines on a custom styled map. However I can't get the Polylines to be rendered over the top of the street names. Instead they always show like this:

Example

I've tried adjusting zIndex and waiting for onMapReady before drawing the Polylines but so far no luck. Is this at all possible with this library?

Thanks in advance!