Custom Intent doesn't launch the app like NSUserActivity

In my app I implemented the Siri shortcuts using custom intents at the release of iOS 12 but after iOS 12.1 my intents doesn't work properly and doesn't open my app directly.


For example when I invoke a phrase added to Siri like "Hey Siri run my custom intent" the app doesn't open the app directly but show me the message "You'll need to continue in 'App Name'".


By doing some tests I noticed that using the NSUserActivity Siri does not show that message but opens the app immediately.

So I would like to have the same result by keeping my system built using the Custom Intents