[NTG-context] \endnote beyond \placenotes[endnote]

I've got the \placenote[endnotes] as first appendix in a book but I want to have an \endnote in a next appendix. The number appears, but the endnote is not added to the actual endnotes. Impossible to do? (I can of course put the endnotes as the last appendix) G