When using the same tinymce editor for different rows of content (i.e. open row 1 to populate editor, close row 1, then open row 2 to populate the same editor), there is an issue where if you hit 'undo' while in row 2, it will start going back to the content from row 1. I would recommend adding in a line that will refresh the undoManager when the content is re-set.

Author: jasonstringify

src/tinymce.js

@@ -168,6 +168,7 @@ angular.module('ui.tinymce', [])
             tinyInstance.getDoc()
           ) {
             tinyInstance.setContent(viewValue);
+            tinyInstance.undoManager.clear();	  
             // Triggering change event due to TinyMCE not firing event &
             // becoming out of sync for change callbacks
             tinyInstance.fire('change');