While reviewing a suggested edit, I encountered something weird: a title is deleted and no title is inserted in the diff as can be seen below.
When I press the "improve" button, I see exactly the same (unmodified) title. This happens both when I use the review tool and when I go to the question page and press the "edit" link.
This is the HTML for that title:
<h2>
<a class="question-hyperlink" href="/questions/248051/difficult-network-configuration"><span class="diff-delete">Difficult network configuration</span></a>
</h2>
I see the edit has been approved and there is no visible change in the title which make it even more confusing.