Based on appearance the metal has failed and broken. I don't have one of them, myself.
Even if that area is "relieved" it was either botched or it later broke, I can't see anyone making such an uneven scalloped edge on purpose.
It is possible that the tool cutting head "chattered" and did a rough cut, and QC didn't catch it, or did and it was within limits. Also possible some small chips of the edge broke off leaving the scalloped appearance. I don't know, it just seems wrong though.
Now the question is, is it a problem???
I'd say contact Springfield, send them the pics and ask their opinion.