My driver's side window has been acting up lately. Once in a while when I get out and close the door, the window rolls down about 1/3 of the way. Luckily I see it most of the time and roll it up but sometimes I have come back to my car to see the window partly down. I have not been able to recreate it and it seems random. It seemed to start happening after I installed a hardtop but that may have just been a coincidence. Please help

Thanks.