When I add a content, CKEditor is fine. It works well and save the content exactly as it is being entered. Now when I try to edit that node or any random existing node, the textarea of CKEditor no longer contains the content entered while it's being added but contains an entire page of a particular page from my Drupal site. The weird thing is that, some existing nodes works correctly on edit mode? I've tried adding just a simple content e.g. "this is a very plain content" but still the problem persists. Anyone experienced this too?