Hans van der Meer schrieb am 07.06.2020 um 11:50:

I gues there are errors in \margindata. See the minimal example. The contextversion is fresh loaded just before this test.

(1) \margindata{test} gives an error. The log message is: tex error > tex error on line 9 in file ./margindata.tex: ! Use of \typo_margins_data_yes doesn't match its definition l.9 \margindata{ text1}% One has to use \margindata[]{test} to avoid the error.

\margindata expects the name of the instance (e.g [inmargin]) as first argument which is missing in your example. This means \inmargin{...} is the same as \margindata[inmargin]{...}

(2) \margindata[]{test} has spurious whitespace,  \margindata[]{test}% must be used to avoid that.

This is normal because when you use \marigindata within a paragraph you create something similar to this: \starttext text text text {} text \stoptext Wolfgang