Dialogflow ES test area don't recognize the configured intents and calls "Default Fallback Intent"

I am following the Google basic course to create a chatbot with Dialogflow and have already created an agent, create an intent and then I am assigning phrases via the Training option to this test intent called "Schedule Appointment" and then "approving" then in the training screen. Then I check if they are in the "intent", check if the variable is OK, then if the response is correctly configured and all looks great there, then I test with exactly the same phrase I have just added to the intent but it keeps ignoring it (maybe this has something to do: https://cloud.google.com/dialogflow/es/docs/intents-training-phrases#example_and_template_modes

What I am doing wrong?

I am attatching images of the intent, the training of the intent and of the test result (try it now).

Thanks,

The test should return me the response, since I am using the same exact phrase the agent is already trained in the intent and I have a configured response, but it returns me the "I don't understand you" response from default Fallback, instead of calling the "Schedule Appointment" Intent.

This looks like a transient issue in some projects, a Google cloud public issue has been addressed here which discusses the same issue and Dialogflow engineering team is working on it. You can +1 to vote and show that you're affected by it.

All future updates on the issue will be shared on the public issuetracker thread.