If you figure this out, let me know. I dealt with this on mine. The PO removed the window from the track and the rubber filler was old and deteriorated.
I tried to reseat the window 6-9 times using various methods. I finally removed the entire window and got new rubber filler and crimped the metal track to have a stronger clamping force on the window. Then I braced a 2x4 against the window and smashed the window into the track forcing it into the groove.
Every method I’ve tried worked for a few days before the window unseated again. Now the window is up, the switch is disco’d and my kid is pissed because she is the only one without window controls.
I’m currently working on buying an entirely new window assembly.