Thrown ball hits coach's bucket

[Ran.D]

10U USSSA travel ball, coach is outside dugout calling pitches from a bucket. Batter lines to center and takes second. Wild throw to 2B goes over infielders head, runner heads to third. Throw hits the bucket and bounces back to the catcher who holds the runner at third.

Offensive coach argues that runner should be awarded home. Defensive coach argues the bucket is part of the playing field.

I'm not calling, but my son is playing and I suggest it's coach interference.

Conference, TD is called, and runner remains at third.