Hi Jason,
thanks for your report.
Can you create an easy example that can be reproduced?
I wonder what happens if there is a long word (having not whitespace),
even when entered via the web. I guess that something it even is
preferable to not line-break those "words", e.g. when they are urls.

Experiment:
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstu
vwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz