LaTeX and MathML not always consistent in questionnaire module

1- Create questionnaire activity with one long text question type

2- Answer the questionnaire typing LateX (or using math editor)

3- According to the report type (all answers / your answers / individual answers) the LateX expression will be interpreted (with proper filter on of course) or not.

Here's a quick screen capture of the issue.

http://screencast.com/t/GpAJuqbrRa8d