Electrical Power Windows

How is the window speed when going up relative to the other window? If it is slower the cause could be wear in the felt channel guides. Modern motors use a current limiting biscuit style resistor in the motor. If there is any appreciable drag on the window it acts sort of like a circuit breaker. You can try some teflon spray lube in the felts. Also observe if the glass is rocking when changing directions, which also points to guide wear. Use only teflon spray as other lubes will attract dirt and get gummed up which makes the problem worse.

It sounds like there is something getting in the way of the glass that is increasing resistance at which point the motor stops.

This may or may not apply but my 2013 Focus had an issue a few months ago where the rear passenger side window would stop when I tried to close it and it would automatically open again. After popping the panel off and inspecting everything I found a small pebble had lodged itself in the felt channel which I assume was triggering a safety feature which opens the window if anything is obstructing it. So for example you can't close the window with someone's arm in it. I only discovered the pebble because I tried to open and close the window several times and the window finally got past it and I could hear it rubbing against the glass. I was able pull the pebble out and everything was fine again.

I'm not sure how the glass is mounted in your particular door but the glass in my Focus was mounted to a single point (it was a rear passenger window). So I could rock the glass a bit side to side but I could not move it up and down. So I would not try to force the window up or down as you may break it more.