In order to ensure that the answer is obvious to people visiting this question in the future: the OP (wesley) answered the question himself in the comments beneath the question:

The cause of the problem is that Internet Explorer 11 makes textarea elements inherit whatever white-space property is applied to the direct parent.

The resolution is to apply white-space: pre-wrap to the textarea, as identified by Jean-François Beauchamp.

Answer from johnkavanagh on Stack Overflow
🌐
Can I Use
caniuse.com › wordwrap
CSS3 Overflow-wrap | Can I use... Support tables for HTML5, CSS3, etc
Partial support refers to requiring the legacy name "word-wrap" (rather than "overflow-wrap") to work.
🌐
Webdevelopmentreference
webdevelopmentreference.com › home › ie 11 – word wrap or word break not working for long word or overflowing text
IE 11 - Word Wrap or Word Break not working
April 18, 2018 - If you are attempting to wrap very long words or hyperlinks within a narrow container, you may experience text overflowing when viewing your results in IE11. This may happen despite using the CSS declaration word-wrap: break-word; in IE 11, but looks fine in other browsers.
🌐
Customerfx
customerfx.com › article › word-wrap-not-working-in-infor-crm-8-1-x-and-newer-on-ie-11
Word Wrap Not Working in Infor CRM 8.1.x and Newer on IE 11 | Customer FX
The key is to modify 2 css files in the Infor CRM virtual file system. Within both the layout.css and sage-style.css there is a style definition for textarea classes that looks like this · .textcontrol textarea, .twocoltextcontrol textarea, .threecoltextcontrol textarea { overflow: auto; }
🌐
Css3files
css3files.com › overflow-wrap
overflow-wrap – CSS 3 Files
Since overflow-wrap has replaced the old word-wrap property, you have to use both for compatibility reasons. For detailed compatibility info see caniuse.com. Firefox 4+Safari 5+Safari 7+, Chrome 31+Internet Explorer 8+Opera 11+ iOS 3.2+Android 2.1+Opera Mini 5+Blackberry 7+IE Mobile 10+
🌐
CSS-Tricks
css-tricks.com › almanac › properties › o › overflow-wrap
overflow-wrap | CSS-Tricks
September 28, 2022 - But others shouldn’t – i.e. long strings of numbers, some special or repeated characters or mix of them, and for them hyphens won’t work (unless you are Safari, then expect unexpected..) I is also true, that overflow-wrap: break-word would break the word in this example, as it will break everything but not necessarily in the same or correct way.
🌐
MDN Web Docs
developer.mozilla.org › en-US › docs › Web › CSS › overflow-wrap
overflow-wrap - CSS - MDN Web Docs - Mozilla
August 9, 2025 - ... Lines may only break at normal word break points (such as a space between two words). ... To prevent overflow, an otherwise unbreakable string of characters — like a long word or URL — may be broken at any point if there are no otherwise-acceptable break points in the line.
Find elsewhere
🌐
MDN Web Docs
developer.mozilla.org › en-US › docs › Web › CSS › Reference › Properties › overflow-wrap
overflow-wrap - CSS - MDN Web Docs
November 7, 2025 - ... Lines may only break at normal word break points (such as a space between two words). ... To prevent overflow, an otherwise unbreakable string of characters — like a long word or URL — may be broken at any point if there are no otherwise-acceptable break points in the line.
🌐
Zzz
zzz.buzz › 2017 › 01 › 15 › word-wrap-in-ie-edge-and-other-browsers
word-wrap in IE/Edge and Other Browsers - zzz.buzz
January 16, 2017 - word-wrap has been renamed to overflow-wrap, and the original name is now considered an "alternate name" for overflow-wrap. But the new name is not supported by IE, Edge, or Firefox < 49, while the old one is just supported by every browser.
🌐
LambdaTest
lambdatest.com › home › web technologies › browser compatibility of css3 overflow-wrap | cross browser compatibility score of css3 overflow-wrap
Cross Browser Compatibility Score of CSS3 Overflow-wrap
/* Keyword values */ overflow-wrap: normal; overflow-wrap: break-word; overflow-wrap: anywhere; /* Global values */ overflow-wrap: inherit; overflow-wrap: initial; overflow-wrap: revert; overflow-wrap: unset; CSS3 Overflow-wrap on IE is partially supported on all IE versions. CSS3 Overflow-wrap on Edge is fully supported on 18-133 and partially supported on 12-17 Edge versions. CSS3 Overflow-wrap on Firefox is fully supported on 49-138, partially supported on 3.6-48, and not supported on 2-3 Firefox versions.
🌐
SitePoint
sitepoint.com › html & css
How can I wrap the text in IE - HTML & CSS - SitePoint Forums | Web Development & Design Community
January 5, 2017 - It seems like IE11 combines the overflow: visible with a white-space: nowrap. Have you tried to declare white-space: normal to correct this? I think this could depend on the document type. I see it’s an XML file, could you post a working demo so maybe someone can test in their IE (I can’t).
🌐
GitHub
github.com › Phlow › feeling-responsive › issues › 71
Internet Explorer 11 - Word breaking · Issue #71 · Phlow/feeling-responsive
January 12, 2016 - While viewing Feeeling Responsive with Internet Explorer 11, I noticed some issues with word-breaking. Using the IE development tools, I changed the ms-word-break and word-break properties. Seemed ...
Author   rchampagneca
🌐
Chrome Platform Status
chromestatus.com › feature › 5126089347170304
overflow-wrap: anywhere
October 2, 2019 - We cannot provide a description for this page right now
🌐
Can I Use
caniuse.com › mdn-css_properties_overflow-wrap_anywhere
CSS property: overflow-wrap: anywhere | Can I use... Support tables for HTML5, CSS3, etc
"Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers.