Webstandard validation error: p element around div

We have 4 webstandards reports with the following message:

ERROR: No “p” element in scope but a “p” end tag seen. at line [1076] column [10]

It concerns the following pages:

• xwiki:Tour.WebHome()
• xwiki:Help.Applications.Movies.WebHome()
• xwiki:Help.Applications.Contributors.WebHome()
• xwiki:Menu.WebHome()

After debug it seems that the detected </p> is located after the renameAppModal, but it's not alone: an opening <p> is actually located just between the entries title and the livetable-container div opening, see:

<h1 id="HEntries" class="wikigeneratedid wikigeneratedheader"><span>Entries</span></h1><p>                                                                                                                                                                                   <div class="xwiki-livetable-container">

So the issues seems that the p is around a div. Now I've not been able to find why this appears on those pages and what caused this regression in 12.0RC1.