Before rebooting, you must close tinymce correctly in order to be able to reinitialize the tinymce editor after the reboot has been done. This is necessary because tinymce does not like being dragged around the house. And the initialized instances of the editor can have one unique identifier (using reload will force tinymce to try to initialize the second editor with the same identifier that will fail).
Tinymce3: To close the edtor instance, follow these steps:
tinymce.execCommand('mceRemoveControl',true, editor_id);
To reinitialize use
tinymce.execCommand('mceAddControl',true, editor_id);
Tinymce4: To close the edtor instance, follow these steps:
tinymce.execCommand('mceRemoveEditor',true,editor_id);
To reinitialize use
tinymce.execCommand('mceAddEditor',true,editor_id);
source share