Window issues

My rear drivers side window didn’t work when I bought my 4Runner. Decided to take a look and when I opened everything up, the bottom window track was laying at the bottom of the door. I put everything back together but when the window rolls down the regulator arm just pulls the track completely off the window. The window goes up and down pretty smoothly by hand so it’s not catching on anything. I don’t think I am supposed to add any adhesive to attach the rubber to the window am I? I tried to upload a video but couldn’t get it to work. TIA!

 

Is it a replacement door? Something doesn't look right.

I would open up a working door and compare.

 

Door is original. Maybe at one time the rubber strip was glued to the glass.