applications are no longer notified of the source application unless they are from the same application group.
I set up two of my apps in same application group like:
but still getting sourceApplication nil:
let sourceApplication = options[.sourceApplication] as? String
func application(_: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey: Any] = [:]) -> Bool
Additional details: Second app is opened using UIDocumentInteractionController from first app. This is working in iOS 12.0. Stopped working in iOS 13.0 beta.