question: how long were they on the smoker?
At 180 IT I would initially say they were undercooked. I run ribs (mostly babybacks) at 250 for about 6 hours to get the IT at about 195-205 ish and doneness I like.
I gave up on wrapping and 3,2,1, and 3, 1,1, methods a decade ago. too much fussin.