Text Editor Problem in Forums

When I try to post the forum, In the first go it shows the Editor in a right manner (ref. forum1.jpg), after hitting the submit button it shows the forum page, and now when I click on edit button from the same page without clicking on any other link (menu) it shows the correct editor as well, I can edit it perfectly. But when I click on any other link (in menu like forum etc...) and then go back to my forum to edit it within the specified time it shows blank text area without any editor and content in it (ref. forum2.jpg).

sometimes it shows the editor properly and sometimes it shows only textarea while editing.

if you are using a 3rd party addon like cometchat its probably a jquery conflict

No I am not using 3rd party addon. Sometimes it creates the problem with editor. But from last couple of days I am getting the perfect editor without any issues.