Mine "bounces back" by closing and opening mid way if I let it go up by itself. I can control it by carefully closing it but it always bothered me. Do you know I this is related to the contacts too or is a different problem? I want to know before I open everything...
I think your switch might be faulty. There is the chance that something is broken inside or it is possible that the contact strip slipped.

I have a similar question. The auto up feature on my passenger window stopped working, the down works fine. Would this work for my problem too?
This is a dirty contact strip preventing the auto up and you will be able to repair the issue. The auto up has an extra contact that enables the auto function when the switch is maxed out.

Let me know if anyone needs pictures of the auto up for the driver's switch and I will pull my switch apart.