Hello. I've noticed that there is a problem with a word wrapping in embedded in Customer Portal knowledge-base article, written in Confluence. Words at the end of the line shouldn't be divided it to parts. Instead it shold be moved to the next line.
I think there is a problem with a CSS file, becasue if I edit it on-the-fly in Safari WWW Inspector, turning off a body {word-break:break-all} tag, words are moved to the next line.

Jira Service Desk Server Edition, version 4.3.2, Confluence Server Edition, version 6.15.8, Ubuntu 16.04 LTS Server with NGINX SSL Reverse Proxy.