My 2018/4th Gen does that from time to time. Need to reset the wonky window. Start the truck, press and hold the down function on the affected window, when it gets all the way to the bottom continue holding the button in the down direction for an additional 5 seconds. Then immediately roll same window back up all the way until it stops and continue holding the button in the up position for an additional 5 seconds. Release the window button and turn the vehicle off. Wait a few seconds and turn the truck on and test the window, should be reset.