Drivers door window dropped down on own - would not come back up

Hi all,

Today when driving my drivers side window lowered to the bottom on its own and would not come back up when i pulled the window button to come back up. Took some 5 minutes and various combinations to come up just a little. It then dropped again to the bottom. Eventually it came back up and to the fully closed position and I made it home.

Has anyone ever experienced this on any model - I'm sure the window systems/electrics are all the same. Car is a 2015 SQ5.

Thanks in advance