2015 Chevrolet Traverse - Window goes down on its own

Rear passenger side pwr window goes down on it’s own and stays down. Will not go up from either switch. Dealership changed out drivers master switch. Windows worked fine for 3 weeks. Then today, on it’s own, rear passenger window went down and not responsive to either switchwes.

There may be an issue with the BCM.

Tester

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