Is \setuppagenumber broken? Or do it misuse it?
In the next minimal example the pagenumbers are not reset after the third page, as I would expect.

Hans van der Meer

\setuppapersize[A6][A6]
\starttext
\setuppagenumber[number=1,state=start]
page 1\page
page 2\page
page 3\page
\setuppagenumber[number=1]
page 4\page
page 5\page
page 6\page
\stoptext