Spudalumps
Senior Retro Guru
LBS cracked my new one on install 

It probably is, as pretty much the only way to get the crown race is to buy the whole headset. Which at he moment are a lot of money.It’s not worth the fight tbh![]()
Why would you cut a ball bearing raceStrange. You haven't got a pic of the cracked race have you?
They could have cut it to fit it or used a split one instead. Without seeing it though that's just a guess, and like above, it would take some effort to crack one, possibly damaging the race surface as well.
I would definitely be talking to the shop about it though.