Did you ever manage to find a solution. I have the same problem, and I have no idea how to solve it. The rendering is quite different in Firefox than Chromium but both are quite incorrect.
This is really a problem for me, because I am going to use this as an online exam in two weeks. To enable TeX filter is a very bad idea for me because then there are many, many question bank that wont work anymore. I just found out of this yesterday, and it is driving my crazy (I had all my focus on ensuring that the questions and options were correct displayed - I never thought that I would need to check whether the feedback alsi was correct)
Please help, somebody