Cloze (multianswer) question special character issues

I try to edit a cloze question with TeX fragments in it. For example $$ a
over {a+2}$$. Note that all special characters '\,

' are properly escaped. And it also works - I see the preview correctly.

However, when I afterwards try to edit the question once again, all special characters do not contain backslashes in front of them. I see something like: $$ a \over

$$. The question is then not displayed correctly.

Thus, in each editing, all backslashes needs be added again.