Siri is recognising phrases from my AppIntentVocabulary.plist, but it's not using the VocabularyItemIdentifier values associated with those phrases

Question

I am working on a workout app and want to integrate SiriKit for iOS 10. I already know how to integrate SiriKit and make Siri to work with our app.

Only useful resource on this I can find is Apple's official documentation : SiriKit iOS 10

To make Siri recognise our custom vocabulary we have to add this file AppIntentVocabulary.plist

But the intent.workoutName.identifier always returns spoken phrase instead of VocabularyItemIdentifier that is Cardio Craze instead of cardio_craze_workout

Does anyone facing this issue or found any solution for this?