This is not consistent. It happens infrequently so is not easily reproducible.
After taking the test and submitting the results, I can go back to a question and change the answer after I click the submit button. This is a custom submit button. The answer I originally chose was incorrect, and when I click the submit button, it says it is incorrect, but then it will let me change the answer. When I go back to the results slide, the score has changed as well. Has anyone else run into this?