event.stopPropagation() doesn't work while Ladda button is loading

[mm-gmbd]

I'm using a ladda button in a bootstrap panel header to refresh data in an enclosed table. Clicking on the panel header will open/collapse the panel, but I don't want that to happen if the user clicks the ladda button.

http://jsfiddle.net/mmuelle4/x6c506s6/

Catching the click event and stopping the propagation of the event works if the button is in its normal state, but if the ladda button is loading, the click event is no longer captured.

I understand the reason for the functionality -- the button click event handler isn't called because the button is loading. But - is there an event that can be registered for ALL button clicks (including while loading)?