I've got a page with multiple TinyMce editors and i have drag and drop feature enabled which allows me to change the order of each items.
But as i drag-drop an editor its content gets removed.
See the screen shots :
Before Drag-Drop
After Drag-Drop
Finally fixed the issue...
The solution is to first shut down the tinymce instance (id needed!)
tinymce.execCommand('mceRemoveControl',true,'editor_id');
then do the DOM action and reinit the tinymce instance
tinymce.execCommand('mceAddControl',true,'editor_id');