When you click on the tabs, the accordion is toggling between hidden and shown states, but not consistently with every click. Check out the fiddle for reference.
<div role="tabpanel" id="tabs-test">
<!-- Nav tabs -->
<ul class="nav nav-tabs" role="tablist">
<li role="presentation" class="active"><a href="#divTab1" aria-controls="" role="tab" data-toggle="tab">Home</a></li>
<li role="presentation"><a href="#divTab2" aria-controls="" role="tab" data-toggle="tab">Profile</a></li>
<li role="presentation"><a href="#divTab3" aria-controls="" role="tab" data-toggle="tab">Messages</a></li>
<li role="presentation"><a href="#divTab4" aria-controls="" role="tab" data-toggle="tab">Settings</a></li>
</ul>
<!-- Tab panes -->
<div class="tab-content-outer">
<div class="tab-content">
<div role="tabpanel" class="tab-pane active" id="divTab1">It became popular in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.</div>
<div role="tabpanel" class="tab-pane" id="divTab2">Lorem Ipsum is simply dummy text of the printing and typesetting industry.</div>
<div role="tabpanel" class="tab-pane" id="divTab3">The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..", comes from a line in section 1.10.32.</div>
<div role="tabpanel" class="tab-pane" id="divTab4">The standard chunk of Lorem Ipsum used since the 1500s is reproduced below for those interested. Sections 1.10.32 and 1.10.33 from "de Finibus Bonorum et Malorum" by Cicero are also reproduced in their exact original form, accompanied by English versions from the 1914 translation by H. Rackham.</div>
</div>
</div>
</div>
<!-- /tabpanel -->