after 6 post without no answer i hope one staff or admin see and answer this post
as you can see at the right box i changed my text and hit save but no effect in left box preview
after many test i found out the solution , if my Calendar Type be jalali the changes not saved and not shows and still show previous text !
but when i change Calendar Type to Georgian and change right box text the preview work correctly and show the real-time changes after save
actually i should say that this problem also happened for text module and i think any module that has html css text box
hope developers or admins come here and help us ( regions with jalali calendar ) to use Xibo