Honestly, don't have audio reading the question. Only have audio for answer feedback.
The problem you see is one of the bigger problems that can happen when putting audio on a quiz slide.
We are looking into your issue, w'll get back to you, if we find any workaround for this issue.
Typically I haven't been narrating quizzes, but what I'm doing is putting in a pop quiz that is just one single question. I wanted it to be more of a reinforcement/learning opportunity which is why I wanted it narrated.
It may be best to put a slide prior to the question slide that allows you to explain/describe/ask the question.