I believe I blew this one !!!

[Chess Ref]

ASA 14U championship game. I am PU. R1 on 3B. Batter walks. Defensive teams coaches start yelling "Throw it back to pitcher ". I mean loudly and all at once. Runner rounds first, apparently they always do this with a runner on 3B, now the Defensive coaches are screaming hesitation. At this point pitcher just standing there, runner goes back to 1B and coaches screaming 'Hesitation" ,very chaotic scene. I believe done on purpose. Runner on 1B now leaves the base , stops, returns to 1B again, pitcher now throws to 1B, 1B drops the ball and runner scoots to 2B. Defensive team runner hesitated and should be called out. BU is on like his 8th game of day and didn't see it LOL. So being a 1st year ump and really not too confident of the rule i agree with the defensive coach and call the runner on 2B out.

I know this is long but I think I explained it how it went down. please give me feedback so I don't mess this one up again.