Miscommunication / A miscommunication

Hello!
I was reading a book and I saw the following: "this incident occurred due to miscommunication between the pilot and air traffic control."

I've always thought that it's "a miscommunication", with the indefinite article. My English teacher said it's okay to say both. When you use the indefinite article, says my teacher, you are only emphasizing that there was a single instance of miscommunication.

Can you please verify? In such cases, can I choose whether to insert the indefinite article or not?

Thank you a lot.
Juan