audio onclick playback issues, sound stuck in IE and Chromium

audio onclick playback issues, sound stuck in IE and Chromium

Hi,

I added a jquery menu onclick event to play an audio file each time a menu link is clicked,
it works flawlessly in firefox but as you can see under

dev[dot]lightserver[dot]at

the sound gets stuck with IE11 or Chromium browser. Curiously for only one button "Lösungen" playback works as thought. The firebug console doesn't give me a hint what's wrong with the playback.
I'm not that experienced using jquery, but I guess there's some scripts incompatible?

kind regards