Until you get the issue fixed...instead of repeating the bounce over and over (wondering when will it actually go up)..just raise the window up (just prior) to where it usually stops and bounces back...RELEASE the button...then press again.
If you stop the window prior to when it bounces back...then start the upward process again...you can usually get the window closed. Or like mentioned...sometimes if you press & hold the button it may go pass the bounce back point and continue on to close.