I'm no big expert on this, but what I find by searching in templates is that conversation_userinfo hasn't been changed in any of the styles. So it's default, which is like this:
{vb:set schemaAuthor.itemprop, author}
{vb:set schemaAuthor.itemscope, 1}
{vb:set schemaAuthor.itemtype, http://schema.org/Person}
<div class="userinfo b-userinfo b-post__hide-when-deleted" {vb:schema {vb:raw schemaAuthor}}>
<vb:if condition="$user['showavatars']">
{vb:set avatarbase, ''}
<vb:if condition="empty($conversation['avatar']['isfullurl'])">
{vb:set avatarbase, {vb:raw baseurl_corecdn}}
{vb:strcat {vb:raw avatarbase}, "/"}
</vb:if>
<vb:if condition="!$conversation['userid'] AND $conversation['avatar']['avatarpath'] AND $conversation['avatar']['hascustom']">
<span class="b-avatar b-avatar--m b-avatar--thread h-margin-bottom-l"><img src="{vb:raw avatarbase}{vb:raw conversation.avatar.avatarpath}" alt="{vb:raw conversation.authorname}" title="{vb:raw conversation.authorname}" /></span>
<vb:elseif condition="!$conversation['userid']" />
<span class="b-avatar b-avatar--m b-avatar--thread h-margin-bottom-l"><img src="{vb:raw avatarbase}images/default/default_avatar_medium.png" width="64" height="64" alt="{vb

hrase guest_avatar}" title="{vb

hrase guest_avatar}" /></span>
<vb:elseif condition="!empty($conversation['senderAvatar']) AND !empty($conversation['senderAvatar']['avatarpath']) AND !empty($conversation['senderAvatar']['hascustom'])" />
<a href="{vb:url 'profile', {vb:raw conversation}}" class="b-avatar b-avatar--m b-avatar--thread h-margin-bottom-l"><img src="{vb:raw avatarbase}{vb:raw conversation.senderAvatar.avatarpath}" alt="{vb:raw conversation.authorname}" title="{vb:raw conversation.authorname}" /></a>
<vb:elseif condition="$conversation['avatar'] AND $conversation['avatar']['avatarpath'] AND $conversation['avatar']['hascustom']" />
<a href="{vb:url 'profile', {vb:raw conversation}}" class="b-avatar b-avatar--m b-avatar--thread h-margin-bottom-l"><img src="{vb:raw avatarbase}{vb:raw conversation.avatar.avatarpath}" alt="{vb:raw conversation.authorname}" title="{vb:raw conversation.authorname}" /></a>
<vb:else />
<a href="{vb:url 'profile', {vb:raw conversation}}" class="b-avatar b-avatar--m b-avatar--thread h-margin-bottom-l"><img src="{vb:raw avatarbase}images/default/default_avatar_medium.png" width="64" height="64" alt="{vb:raw conversation.authorname}" title="{vb:raw conversation.authorname}" /></a>
</vb:if>
</vb:if>
<!-- responsive alteration: Added userinfo-details wrapper in order to
support left floated avatar with all other information on the right. -->
{vb:set userInfo, {vb:raw conversation.userinfo}}
<div class="b-userinfo__details">
{vb:set schemaAuthor.itemprop, name}
<div class="author h-text-size--14">
<strong><vb:if condition="$conversation['userid'] > 0"><a href="{vb:url 'profile', {vb:raw conversation}}" {vb:schema schemaAuthor}></vb:if><vb:if condition="isset($conversation['musername'])">{vb:raw conversation.musername}<vb:elseif condition="isset($conversation['authorname'])" />{vb:raw conversation.authorname}<vb:else />{vb

hrase guest}</vb:if><vb:if condition="$conversation['userid'] > 0"></a></vb:if></strong>
{vb:template pmchat_userinfo_link, conversation={vb:raw conversation}}
</div>
{vb:hook 'conversation_above_usertitle'}
<vb:if condition="!empty($userInfo['usertitle'])">
<vb:comment>usertitle is already html escaped in the userInfo array, if it's required</vb:comment>
<div class="usertitle">{vb:raw userInfo.usertitle}</div>
</vb:if>
{vb:set reputationimglevel {vb:raw conversation.reputationimg.level}}
<div class="b-meter h-margin-top-m {vb:raw conversation.reputationimg.type}" title="{vb:rawphrase {vb:raw reputationimglevel}}">
{vb:set counter, {vb

hp range, 1,5}}
<vb:each from="counter" value="nr">
<div class="b-meter__bar<vb:if condition="$conversation['reputationimg']['bars'] >= $nr"> b-meter__bar--selected</vb:if>"></div>
<div class="b-meter__bar<vb:if condition="$conversation['reputationimg']['bars'] >= $nr"> b-meter__bar--selected</vb:if>"></div>
</vb:each>
</div>
<div class="b-userinfo__rank h-margin-top-s{vb:if "empty($userInfo['rank'])", ' h-hide'}">{vb:raw userInfo.rank}</div>
<ul class="b-userinfo__additional-info-block h-margin-top-xl">
<vb:if condition="$conversation['userid'] > 0">
<li class="b-userinfo__additional-info"><label>{vb

hrase join_date}:</label> <span>{vb:date {vb:raw userInfo.joindate}, 'registered'}</span></li>
<li class="b-userinfo__additional-info"><label>{vb

hrase posts}:</label> <span>{vb:raw userInfo.posts}</span></li>
<vb:if condition="isset($conversation['postelements']) AND $conversation['postelements'] == 4">
<li class="b-userinfo__additional-info"><label>{vb

hrase infractions}:</phrase><span>{vb:raw conversation.warnings}/{vb:raw conversation.infractions} ({vb:raw conversation.ipoints})</span></li>
</vb:if>
</vb:if>
<vb:each from="userInfo.userfield" key="categoryname" value="category">
<vb:each from="category" key="fieldname" value="field">
<vb:if condition="$field['showonpost']">
<li class="b-userinfo__additional-info"><label>{vb

hrase {vb:raw fieldname}}:</label> <span>{vb:raw field.val}</span></li>
</vb:if>
</vb:each>
</vb:each>
{vb:hook 'conversation_userstats'}
</ul>
<ul class="b-userinfo__icons h-margin-none">
<vb:if condition="$conversation['online'] == 'online'">
{vb:set olstatus, ' online'}
<vb:else />
{vb:set olstatus, ' offline'}
</vb:if>
<li class="b-userinfo__icon h-left" title="<vb:if condition="$olstatus == ' online'">{vb:rawphrase x_is_online_now, {vb:raw conversation.authorname}}<vb:else />{vb:rawphrase x_is_offline, {vb:raw conversation.authorname}}</vb:if>"><span class="b-icon b-icon__status--<vb:if condition="$conversation['online']=='online'">green<vb:else />gray</vb:if>"></span></li>
{vb:template conversation_signature, type=collapsed, conversation={vb:raw conversation}, collapsedClass="b-userinfo__icon h-left"}
</ul>
</div>
</div>