Bug with Keymaster blue ribbon

I found a bug with showing KEYMASTER blue ribbons at right corner because of “overflow” missing.

Before, css class that controls it were (obsolete):
(bbpress.css:415)

div.bbp-forum-header, div.bbp-topic-header, div.bbp-reply-header, li.bbp-body div.hentry {
    margin-bottom: 0px;
    overflow: hidden;
    padding: 12px 0px;
    position: relative;
}

Now, this rule does not exist , so I propose add this one for fixing the issue:

#bbpress-forums div.hentry {
    position: relative;
    overflow: hidden;
}

—————

Because of existence of this class:
(bbpress.css:481)
#bbpress-forums .hentry.topic-author {
position: relative;
overflow: hidden;
}
only Moderators ribbon are showing, but not keymaster.

Best Regards,

Albert