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.

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

Below the minimal example and the output.

met vriendelijke groet
dr. Hans van der Meer