Image marker overlays other image markers on iOS

[alizahid]

Check out the screenshots below.

Doesn't happen on Android, and doesn't happen with the default pins either.

My images are in asset catalogs for iOS and in drawables for Android, if that makes any difference (I tried importing, too; didn't matter.)

[vinagrito]

Following this

[alvelig]

#1845 should solve this problem. Please comment if you tested and if there are any bugs detected, as collaborators ask me to have positive replies on my pull request to merge it to master.

[alvelig]

Duplicate of #418