LCid

New user here. I have an 08 ES 350 that has given me no problems so far, but has recently developed a strange habit. Occasionally when I am driving, the left rear window will roll down on it's own. Hitting the switch doesn't stop it, and the switch is locked out for a few seconds but then it will let me roll the window back up. Anyone else experienced this? Any idea where the problem could lie? Thanks!