Weathertech side deflectors can’t fully close the windows, they go back down

These things are absolute trash. I would try to return them. Got a pair a couple years ago, and it was horrifying to use them. Little bits of sand and debris would scratch and make awful noises against the glass and plastic. My windows are tinted after-market, so the debris and the plastic started wearing through and scratching the tinted film.

It's a terrible design. The ones that go outside the window track are much better. Had the same issue as you - the window thinks there's a foreign object, and for safety, it won't close, then opens the window automatically. It's a design flaw. Should be a class action lawsuit. Garbage product.

 

If you keep them, you can probably go through the same procedure used for when the 12 volt battery has been replaced to teach the windows where 'up' is, and then they won't think they've hit an obstruction and reversed.