Per definition: If an element has multiple event handlers on a single event, then even if one of them stops the bubbling, the other ones still execute.

But that doesn't seem to be the case. Is this caused by a certain implementation detail or could this be a non expected behavior?

Example:
<a href="#" class="new-message-button text-uppercase"><span class="short">Nachricht</span><span class="long">Ihre Nachricht an uns</span></a>

The a- element has an event-listener that stops bubbling:
function() { return $(this).parents(".new-message-box").addClass("open"), !1 }

Attaching an "All Links Click" Trigger has no effect. As soon as the first event-listener is deleted, the "All Links Click" trigger starts to fire onclick.