Action_default_fallback returned when not required

I’m using Rasa X for improving my chatbot. I’m getting some conversational errors… the intents are correctly recognised, but the response is often wrong. In particular, many times it returns action_default_fallback even if the intent appears in the stories only before a particular action.

Like in this example:

Where the intent feedback appears only in this story:

This is my config file:

language: en
pipeline: supervised_embeddings
  - name: MemoizationPolicy
  - name: KerasPolicy
  - name: MappingPolicy
  - name: TwoStageFallbackPolicy
    nlu_threshold: 0.15
    ambiguity_threshold: 0.1
    core_threshold: 0.15
    fallback_core_action_name: action_default_fallback
    fallback_nlu_action_name: action_default_fallback
    deny_suggestion_intent_name: out_of_scope
  - name: FormPolicy

I kept the threshold very low for trying to solve the issue, but it didn’t work

I tried to train the model multiple times but didn’t help

Please provide the debug log output so we can see the prediction. Also, if your bot is primarily an FAQ bot with single-turn interactions, switch from the MemoizationPolicy to the AugmentedMemoizationPolicy