Batter touching home plate while hitting - OBR

[Brolo]

Another very similar question...

What if the batter hits the ball into fair play then, while running to first, touches home plate with his/her foot? Is this an automatic out?

The reason I ask is that a teammate of mine was called out last night for this very reason. I'm a lefty batter so I've never had to cross home plate to get to first and never given this thought, but I really wonder about this call. I've played ball since the day I could walk and have never seen or heard of such a rule.

Anyone have a definitive answer? Maybe we just had a terrible umpire?

Thanks in advance. And by the way...we lost the game by one run.