With Virtual agent and NLU integration, we can search for a specific utterance on Virtual agent, the system should bring the relevant topic and populate it on Virtual Agent. But this was not happening.
The specific utterance used was linked to the relevant Intent.
However, relevant NLU model and Intent is not associated with the expected Virtual agent topic as shown in the below screenshot. Hence, the NLU server couldn't respond with the expected topic for the search operation with the utterance on Virtual Agent.
Please associate NLU model and intent with relevant Virtual Agent topic, then publish the topic and train the NLU model. This should resolve the issue.
Please refer following article describes on the issue with training NLU models KB0755722.