Bromate should decompose to bromide during baking. I wouldn't worry too much.
Now do you trust the over worked min wage worker who most likely doesn't give a shit to bake your bread until it's safe to eat ? Do you trust the food lobbies to tell you the truth ? The US is one of the most corrupt place for these things ("fat makes you fat", ddt, tobacco, &c.)
And its used in ppm levels.
Were not eating grams of it.
bread should just include water, flour, and yeast IMO. anything else is an abonimation.