Custom marker icon not showing up on iOS

Hi,

I would like to add custom icons to markers on iOS but I cannot make it work.
I've tried getting the path with tabris,app.getResourceLocation(filepath) and manually with tabris.fs.filesDir, but it only works on Android, on iOS I get nothing, just the default marker icon seems to work when I set the image to null.
` const marker = new esmaps.Marker({
position: [m.c[0], m.c[1]],
image: this.getMarkerImage(m)
})`

Am I missing something iOS specific? Thanks!