BuddyPress.org

Since the tabs are loaded via ajax, you have two options.
1.Write an appropriate filter to send the response via ajax
2. Or just make the group tabs use non ajax loading
here is how you do the second
Edit the line in your groups/index.php
<div class=”item-list-tabs”>
and make it
<div class=”item-list-tabs no-ajax”>

It should work.