Font change in last distractor of multiple choice.

I have created an assessment using multiple choice and true-false questions. The true-false look fine, but the last distractor on all of the multiple choice questions looks like a different font than all of the rest of the answers displayed. This only happens in the published course, it looks fine when I test the page from the view menu.

This has happened on multiple courses and we've created a work around where we turn all of the answers words into image files, but it's not clean or elegant. And is a pain if there is a change to the question later.

Anyone else having this issue?

Is there a fix?

Thanks.