[NTG-context] ebook from project: hyphenation lost

Ahoi, I never managed to get a proper eBook from a project, the content was mostly missing, a whole while even \setupbackend[export=yes] led to an error. At least that I don’t get an error any more, I’ll try to debug the missing content later. One bug I can nail down is: As soon as I add \setupbackend[export=yes] to my environment, all hyphens are lost! I.e. hyphenation takes place, but there’s no hyphen (an no space left for it). That doesn’t happen in a single document, so I can’t provide a minimal example. (Yesterday’s beta MkIV on OSX-Intel) Greetlings, Hraban