This is very similar to my Text Area word wrap issue I reported in about word wrapping in SC 12.9.
From my case ticket:
Thu Sep 17 13:09:00 EDT 2015
I noticed today while using my IE11 with SC 12.9, the Text Area component does not word wrap. However my coworker using IE8 in the same environment the component does word wrap.
Resolution: I applied patch T5ES155 that support provided me.
Dump from the install text with the patch of the prob/symptom:
PROB #: 1241 FN: T5ES155 DATE: 25 Mar 2015
PROBLEM SYMPTOM: WIN-
Long text in text area doesn't wrap in IE11.
We do not use the USS product in my organization and do not have anything beyond English formatting so I so not know if your issue could be related to what I ran into or not but thought I would toss it out there.
Best of luck,
Sky