Libre Math: space + in= epsilon, how to stop it?

Every time I try to write something like {age in years}, it converts it to be age%epsilon years. How to change it, is it a bug? If it is a bug someone report it.

in is a keyword in Math for “in set”. If you need some free-form text, enclose it into quotes: "{age in years}".

This is not a bug. But regarding your words

If it is a bug someone report it

please don’t hesitate to report your own bugs. No other is interested to do that.

Thank you, good sir.