Popover stays 'live' when you close a modal containing it via clicking on the backdrop.

Created by: macbem

When you create a modal with a popover inside and you close the modal via clicking on the backdrop, the popover is still alive and has left: 0; and top: 0;.

I've tested this on OS X El Capitan in Chrome and on Ubuntu 14.04 in Chromium.

The issue can be reproduced in your example modal that's embedded into the documentation - http://v4-alpha.getbootstrap.com/components/modal/#live-demo