What URL is showing the problem, and what is the exact name of the affected job? I cannot reproduce this on a mostly pristine Jenkins with the job name
job with long name that does nothing of significance
It correctly breaks into lines on the test VM of IE11 with Windows 8 from modern.ie.
Is your IE setup corporate controlled (with possible non-default presentation settings)? Does the same issue occur if you spin up a new Jenkins and create a job with a long name?
When I use the name
job_with_long_name_that_does_nothing_of_significance____
it does not break at all, but also not split like your example appears to be.
> Is your IE managed by an IT department and may have non-default options set?
Yes.
> Does Jenkins complain about a non-default document mode?
I don't think I have noticed this.