Cannot handle INPlayMediaIntent in the background

Hello everybody,

I've been struggling with implementing Siri voice shortcuts for media intents. I followed all the indications on the documentation, but when my Intent Extension (conforming to INPlayMediaIntentHandling protocol) calls handler method's completion block with INPlayMediaIntentResponseCode.handleInApp as response code, iOS doesn't wake the app in the background but asks the user to open the app.

This is my Intent Extension:

class IntentHandler: INExtension, INPlayMediaIntentHandling  {
    
    override func handler(for intent: INIntent) -> Any {
        // This is the default implementation.  If you want different objects to handle different intents,
        // you can override this and return the handler you want for that particular intent.
        
        return self
    }
    
    func handle(intent: INPlayMediaIntent, completion: @escaping (INPlayMediaIntentResponse) -> Void) {
        let response = INPlayMediaIntentResponse(code: INPlayMediaIntentResponseCode.handleInApp, userActivity: nil)
        completion(response)
    }
    
    func confirm(intent: INPlayMediaIntent, completion: @escaping (INPlayMediaIntentResponse) -> Void) {
        let response = INPlayMediaIntentResponse(code: .success, userActivity: nil)
        completion(response)
    }
    
}

I made a bare bone project to reproduce the issue: http://media.digitalia.fm/MediaShortcut.zip

Steps to Reproduce:

1 - Build and run the attached project on a device or on the simulator.

2 - Press the button to record a voice command for the shortcut.

3 - Exit the app and lock the device

4 - Invoke siri with the recorded voice command

Expected Results:

App should be awaken in the background and application(_ application: UIApplication, willContinueUserActivityWithType should be invoked so the app can begin playing the media item in the background with no user interaction.

Actual Results:

System displays the message "Sorry, there was a problem with the app" and presents a button to open the app. If the user touches the button, TouchID confirmation is asked and then the app is opened in the foreground and willContinueUserActivityWithType is invoked.

Did anybody find a way around this?

Thanks