stkContact has been made available in the main content area [1], however stk stylesheets do not take account of this:

<dl class="tel">
  <dt><span class="type">work</span> Work</dt>
  <dd class="value">+41 (0)61 228 90 00</dd>
</dl>

<span class="type">work</span>

has to be hidden by CSS.

Option 1 (keep it available):
If this component should still be available in the main content area, plase consolidate duplicate ftl templates and add CSS.

Option 2 (remove component):
Remove duplicate template /templating-kit/components/content/contact.ftl and remove [1].

[1] /mgnl-bootstrap/standard-templating-kit/templates/pages/config.modules.standard-templating-kit.templates.pages.stkArticle.areas.main.areas.content.availableComponents.stkContact.xml

DECISION:
Keep it available in content area.