Also, running into the exact same issue here.  Kind of disheartening to see several requests for help on the same issue, search of knowledge base has nothing and forum question has no responses at all for extented period of time.

Some more investigation and seems that this is related to the control being inside a formview (templated containers a problem?).

 This is puzzling since one would often want to bind an editor to a field and formviews are the main tool for this.

There has got to be a way for this to work.  Or, for me, the tool is relatively useless.