I've created a screen capture to illustrate the issue: http://screencast.com/t/Of308yx5
I've noticed it's also referenced here: https://premium.wpmudev.org/forums/topic/scholar-theme-global-site-tags-nav-menu-formatting-problem
Perhaps as a stop gap measure, can someone explain what David Payne did: I'd be happy to exclude the tags page from the site menu at the top if that solves it, as I am utilizing the tags widget in the sidebar.
What is an exclusion function? I assume it would go in the functions.php file of my bp-default child theme.
As an alternative, I'd love for the tag page to work, but if it's not BP compatible, the widget is certainly an acceptable sub.