This is true - Brandon Miller drove past Jackson into the lane a few times, but the team collapsed and Jackson recovered. The fact is though, that was the entire defensive gameplan:
""We got into [Miller] in the halfcourt, 5-on-5," said Hurley. "Got into his air space, made him handle the ball. Anytime that he got involved in any type of dribble hand-off or ball-screen, we were super-aggressive. We wanted to chase him off the line and make him handle the ball."
Jackson was told to guard Miller close so that he couldn't get his elite 3-point shot up. A side effect of that is that Miller was able to drive, but the team was prepared for it, and Jackson was able to recover as well.