Blisters on Crust

Toast

I've never seen this many blisters on my loaf.

Is this normal?

What is this a sign of?

Yup. Spraying water on the dough can cause this. Get a finer mist sprayer. Or reduce the amount of spray. 

Yup. Spraying water on the dough can cause this. Get a finer mist sprayer. Or reduce the amount of spray.