Why do widgets have not enclosing container around them?

Here is the Widgets for recent replies I was expecting a <div class="bbpress-widget-recent">code</div> or at least a <h1></h1> around the title

"Recente Reacties"

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<a href="/members/" title="Bekijk profiel" class="bbp-author-avatar" rel="nofollow"><img src="http://gravatar.com/avatar/b24c3f45ce107cd64af84ff792df90da?d=mm&s=14&r=G" class="avatar user-4-avatar avatar-14 photo" width="14" height="14" alt="Profile photo of user"></a>&nbsp;<a href="/members/" title="Bekijk profiel" class="bbp-author-name" rel="nofollow">User</a> op <a class="bbp-reply-topic-title" href="/onderwerp/link" title="link">link</a>
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<a href="/members/" title="Bekijk profiel" class="bbp-author-avatar" rel="nofollow"><img src="http://gravatar.com/avatar/b24c3f45ce107cd64af84ff792df90da?d=mm&s=14&r=G" class="avatar user-4-avatar avatar-14 photo" width="14" height="14" alt="Profile photo of user"></a>&nbsp;<a href="/members/" title="Bekijk profiel" class="bbp-author-name" rel="nofollow">User</a> op <a class="bbp-reply-topic-title" href="/onderwerp/link" title="link">link</a>
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[@robkk Moderator 9 years, 11 months ago]

see if its a plugin or theme issue

Plugins

Deactivate all but bbpress and see if this fixes. if it does, re-enable one at a time to see which is causing the error.

Themes

If plugins don’t pinpoint the problem, as a test switch to a default theme such as twentytwelve, and see if this fixes.