I too use a 5.25 mash pH for NEIPAs. If that acid addition worked before don't change a winning team.
What brand 2-row was that?
Could it have been [EDIT]chit malt? raw, unmalted barley?
It's possible they dumped a wrong sack in the 2-row bin, at your supplier.
I would definitely try to check that before brewing another batch.
As I said before, do a small 8-16 oz test mash with that "2-row" in a small pot in a 155F warmed up then turned off oven. Check for conversion.
What brand 2-row was that?
Could it have been [EDIT]
It's possible they dumped a wrong sack in the 2-row bin, at your supplier.
I would definitely try to check that before brewing another batch.
As I said before, do a small 8-16 oz test mash with that "2-row" in a small pot in a 155F warmed up then turned off oven. Check for conversion.