Hi Jared,
This is related to the rich text sanitization. If you temporarily disable webclient.richtext.sanitize, the href is visible again. Disabling the system property is not recommended due to cross site scripting. But you can adjust the sanitizePolicy.xml in the \applications\maximo\properties directory to try and correct the issue.
Given the significance of the :hostname substitution variable (to enable dynamic links inside of the application that work in any environment), I would open a support case with IBM to try and have the out of box regex rules adjusted to ensure this works.
How to Paste Images in Rich Text Fields When webclient.richtext.sanitize=1
Thank you,
Allan Henle