In Drupal 8 W3CSS Theme 8.x-1.16 the standard font is sans serif (font-family: 'Montserrat','Helvetica Neue',Helvetica,Arial,sans-serif;).
Since last update, some footer elements and user account menu elements have been overwritten with "font-family: 'Times New Roman',Times,serif;".
This happens as example within:
<ul class="ul-parent ul-parent-footer ul-0" role="menu">
or
<div id="copyright-inner" class="w3-row copyright-inner ">
and maybe more ...
The appearance of the pages looks ugly and broken.
Not all content is available!
It's likely this issue predates Contrib.social: some issue and comment data are missing.