Electric window lifter at the Megane 1.6e spins around

Hello! For a few days the electric window lifter has been spinning around on my Renault Megane Classic 1.6e (built in 97). This is expressed by the fact that the driver window goes down during the ride from time to time as if by ghost hand. Then the window lifter is somehow “blocked” for a few seconds and only then I can drive it up again by myself. After about 1-10 minutes it runs down again on its own… Strangely, the problem does not always occur, there are such and such days. Otherwise, the window lifter works perfectly, i.e. I can drive up and down the window at will. Except when it spins again and lets the window down by itself like said Does anyone have an idea? Must have a new window lift in it, doesn’t it?