Invalid HTML is generated when saving page after copy and paste row with mentioned macro and text into row of the table

<table><tbody><tr><td>&nbsp;</td><td><!--startmacro:mention|-|reference="XWiki.npetrenko" style="FULL_NAME" anchor="XWiki-npetrenko-vmfpml"--><!--stopmacro--></td><td>Here is some Text</td></tr><tr><td>&nbsp;</td><td><span tabindex="-1" contenteditable="false"><span data-macro="startmacro:mention|-|reference=&quot;XWiki.npetrenko&quot; style=&quot;FULL_NAME&quot; anchor=&quot;XWiki-npetrenko-vmfpml&quot;" data-widget="xwiki-macro" data-xwiki-dom-updated="true" class="macro"><span class="hidden macro-placeholder">macro:mention</span><span data-macro="startmacro:velocity|-||-|#set ($reference = $wikimacro.parameters.reference)
    #set ($style = $wikimacro.parameters.style)
    #set ($type = &quot;$!wikimacro.parameters.type&quot;)
    #set ($content = $services.mentions.format($reference.reference, $style, $type))
    #set ($anchor = $wikimacro.parameters.anchor)
    #set ($isCurrentUser = $xcontext.userReference == $reference.reference &amp;&amp; ($type == '' || $type  == 'user'))
    #set ($cssClasses = ['xwiki-mention', 'user'])
    #if ($isCurrentUser)
      #set ($discard = $cssClasses.add('self'))
    #end
    #set ($link = $xwiki.getURL($reference.reference, 'view'))
    \{\{html}}
    &lt;\a id=&quot;$escapetool.xml($anchor)&quot; class=&quot;$stringtool.join($cssClasses, ' ')&quot; data-reference=&quot;$escapetool.xml($services.model.serialize($reference.reference, 'default'))&quot; href=&quot;$escapetool.xml($link)&quot;&gt;##
      $escapetool.xml($content)## Do not remove this comment as it ensures that the spacing after mention is not broken.
    &lt;\/a&gt;
    \{\{/html}}" class="macro"><span class="hidden macro-placeholder">macro:velocity</span><span data-macro="startmacro:html|-||-|&lt;\a id=&quot;XWiki-npetrenko-vmfpml&quot; class=&quot;xwiki-mention user self&quot; data-reference=&quot;xwiki:XWiki.npetrenko&quot; href=&quot;/xwiki/bin/view/XWiki/npetrenko&quot;&gt;@Nikita Petrenko&lt;\/a&gt;" class="macro"><span class="hidden macro-placeholder">macro:html</span><!--startwikilink:xwiki:XWiki.npetrenko--><span class="wikilink"><a id="XWiki-npetrenko-vmfpml" class="xwiki-mention user self" href="/xwiki/bin/view/XWiki/npetrenko">@Nikita Petrenko</a></span><!--stopwikilink--></span></span></span></span></td><td>Here is some Text</td></tr><tr><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td></tr></tbody></table>