+1 on the fast sparge. I think that is definitely the reason here.
+1 also on "back filling" with DME. He may even want to steep a little bit of Special B to help plus up the flavor profile.
IMO, 175F is a bit high, too. You should be targeting your sparge to about 168F to help avoid tannin extraction. Pay attention to the pH also, as high pH (above 5.

will extract tannins even more than the slightly high temp.
HTH-