Well when I research this myself I copied and pasted into the box and it wrapped just fine. When I typed out very long sentences it wrapped just fine, but when I just help down one letter key - the wrap didn't work. It just kept going.
So, it looks like it is time for you to file a support request (at the bottom of the help page) to have our customer support team see if this is a technical issue on our side or yours. For now, it will remain forced breaks

Cara