just for information (I do not know if it is a bug) -- looking for a solution for footnotes, I discovered strange behaviour of footnotes produced by the settings below. Compare #1--#9 with #10--#12, it is caused by unadjusted width.
\setupnotation[footnote][
alternative=serried,
distance=.33em,
width=,
numbercommand=\hfill\high,
]
\starttext
\showframe[text][text]
\dorecurse{6}{Toto je text.\footnote{\dorecurse{12}{Bla bla bla. }} }
\page
\dorecurse{6}{Toto je text.\footnote{\dorecurse{12}{Bla bla bla. }} }
\stoptext