Entities recognized even though it shouldn't

Hi!

I have a config, that look like this:

...
intents:
- greet:
    use_entities: []
- make_appointment:
    use_entities: []
- ask_price:
    use_entities: []
- ask_specialist:
    use_entities: []
- ask_service:
    use_entities: []
...

When I use rasa shell or rasa shell nlu I can see, that when I provide ‘make_appointment’ sentence, duckling recognize, that there is some month entity in the sentence (although there isn’t… It’s just my language feature, that some words are short for months and duckling recognize that). What I don’t get is why duckling extracts entities, which are then used in the form logic even though “make_appointment” intent has ‘use_entities: []’ declared. If I understand correctly - None of entities should matter with that.

Thanks for help.