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Hi Michael [Inline Response to message by Mikael Sundqvist via ntg-context, Mi, 2022-04-20 17:12 +0200: Answers and comments below corresponding cited paragraphs.]
The strange thing with fractions seems to be due to the parameter FractionNumeratorDisplayStyleShiftUp in lm.lfg. If you always set it to 600, it seems to work also for luatex. (This will be fixed.)
Another thing: Instead of using \over, I suggest that you use \frac (less surprises). Something like:
\starttext \startformula a=b + 1 \stopformula
\startformula a = \frac{ b + \mu }{ c } \stopformula
\startformula a = \frac{\frac{ b + \mu }{ c } + e}{ d + i } \stopformula \stoptext
Thank you very much for the hints. \frac didn't help either even after moving broken installation aside and doing a fresh install with sh ./first-setup.sh --modules=all --context=latest Results still similar see attached.
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