Bootstrap collapse removing a href events inside of collapse div

I am using Boostrap Collapse from : http://v4-alpha.getbootstrap.com/components/collapse/ , but I got a problem when is a a href link inside my collapse. Right now if I click in any a href inside my collapse the div collapse back, but that happen just with a href links with text the event does not happen, someone know how can I resolve this? In that sample when I click on link1 my div collapse and should just back if I click again in link1, what is happening now is if I click any anchor element inside that div the div collapse back, like if I click in link2 or link3. How can I solve this? there is my sample: http://jsfiddle.net/SMZHG/12/