Mouse up event not detected by movieclip

Hi there Everyone!

I have a very frustrating problem, and I just can’t find the solution. :frowning: However I am sure that I am missing something.

So, I have a very basic beat up “game”. Everything works fine, only the mouse up events are not detected. If I add the event listeners to the stage, then everything (mouse up and mouse down) are detected, but when I add my event listener to the movieclips only the mouse up is not detected (only if I move the mouse upwards while clicking). I go crazy, because I do not understand why… :frowning:

Please see my FLA and AS file (zipped) and try to help if you can!

Thank you in advance!