Exam - dotted lines in front of the answers

I’m not very good at English but let’s try to explain.
With the “exam” mode, the dotted lines are in front of the answers when there are fractions.
Is there a solution ?
Thank you.

This seems to be an issue in the implementation of the macro gap-dots-short in https://github.com/texmacs/texmacs/blob/7f904cb56e043708eb6f1bfe25e57d237610448d/TeXmacs/packages/standard/std-edu.ts#L514

It looks like just superposing dots on the answer. I don’t know whether it is possible to implement this using \wide*.