Just before the launch, when the strongback retracted, did anyone else notice how the umbilical cables became snagged, as the strongback was still retracting?

Just before the launch, when the strongback retracted, did anyone else notice how the umbilical cables became snagged, as the strongback was still retracting? Sure enough, there was a moment where there was no slack, and the strongback actually pulled the Falcon 9 rocket a slight amount, causing it to rock back and forth on the launchpad. You could see it rocking back and forth perhaps by 6 inches or more. The cable snag freed itself and the retraction continued nominally, but the rocket kept teetering for another minute. Pretty interesting. Wonder if they plan for such contingencies.