Thanks, I didn’t notice that.
Those slides are noticeably different, especially the last one where he briefly raises and lowers his arm.
My opinion /interpretation is that judge intentionally extends and keeps his arm up on DP balls in an attempt to distract the fielder or get him to try to throw the ball around his arm. He probably feels that if he is already out and the double play will almost certainly be completed, he has nothing to lose . He was probably laughing privately that he got away with that.