Action_default_ask_rephrase not getting triggered after denying the suggestions in action_default_ask_affirmation

Hi…I am trying to implement two stage fallback policy,after default_ask_affirmation action when the user denies the suggestions, the action_default_ask_rephrase is not getting triggered but the intent(out_of_scope) is getting triggered as expected…Please help me out…

My config File :

# Configuration for Rasa NLU.
language: en

# # No configuration for the NLU pipeline was provided. The following default pipeline was used to train your model.
# # If you'd like to customize it, uncomment and adjust the pipeline.
# # See for more information.
  - name: WhitespaceTokenizer
  - name: RegexFeaturizer
  - name: LexicalSyntacticFeaturizer
  - name: CountVectorsFeaturizer
  - name: CountVectorsFeaturizer
    analyzer: char_wb
    min_ngram: 1
    max_ngram: 4
  - name: DIETClassifier
    epochs: 100
  - name: EntitySynonymMapper
  - name: ResponseSelector
    epochs: 100
  - name: FallbackClassifier
    threshold: 0.1
    ambiguity_threshold: 0.04

# Configuration for Rasa Core.
   - name: MemoizationPolicy
   - name: TEDPolicy
     max_history: 5
     epochs: 100
   - name: RulePolicy
   - name: TwoStageFallbackPolicy
     nlu_threshold: 0.6
     core_threshold: 0.6
     fallback_core_action_name: "action_default_fallback" 
     fallback_nlu_action_name: "action_default_fallback" 
     deny_suggestion_intent_name: "out_of_scope"

@mloubser coulu u please help me out