Div content disappearing (sometimes)after editing in FireFox

I have been searching the forum without success and am now hoping someone else has experienced the same as me and has solution to the problem.

My program works in such a way that when a user clicks on a paragraph (a <div>) on the web-page a CKEditor instance opens instead of the paragraph in order to change the content:

CKEDITOR.replace( div )

When a click outside the div is detected the editor is destroyed (a call to editor.destroy() ).

All this works fine in Chrome but in FireFox it doesn't (always) work!!! If a click outside the <div> is pressed quickly after the editor is replaced it mostly doesn't work! Meaning - when i "stress-test" it the <div> sections dissapear

So my conclusion is that sometimes the editor doesn't update the <div> element - what am I doing wrong?