Broke another bolt.... your thoughts??

[BluntForceTrauma]

My guess is the bolt is normal. I'd first check uneven mating of extension to barrel, or uneven mating of barreled extension to upper receiver. All this exacerbated by increased pressure of suppressor on top of large-ish port in mid-length gas system on an 18". Sort of a perfect storm. And if your loads really are a little warm. . . .