Articulate Storyline Wrong behavior on Quiz

Hi, I'm having a strange behavior on quiz:

While doing a quiz, if I choose an answer and click on the confirm button,  the feedback message appears. At this moment, if I close the window and then re-open the course, it returns to the same question, but it let's me anwser the question again. With this behavior a student can: answer - see feedback - close - re-enter, cicle until he find the correct choice.

Maybe I am doing something very wrong , or it's a flaw of the Storyline...

I tested in SCORM Cloud (https://cloud.scorm.com), my ".story" file is attached too.

If someone has a way to solve this, please contact me!