If the instructor modifies a Survey MOC question's text of a published assessment, the question's text doesn't change

I've found that if the instructor modifies a Matrix Of Choice (MOC) question's text of a published assessment, the question's text doesn't change.

Steps to reproduce this issue:

1. Instructor publishes an assessment which has MOC questions.
2. Instructor changes any MOC question's text of the published assessment.
3. Instructor saves the modified question.
4. The question's text hasn't changed.