I ran into this problem too (although in late January). Had 2 for PDB EWR-PWM (A320 held at the gate for late pax) and was informed we were out while still on the ground! Out? They provision 4 on the regionals that fly ex-PWM. Most F pax drank water and they certainly weren't serving in coach so how can that be?!? Perhaps he didn't want to check coach? He was an absolutely fabulous purser (31 years sUA at DEN) so I don't think that was the case.

I'm not too hoity toity to drink Jack but I feel bad for the next flight (which would be at 6 am lol). AFAIK they double cater to PWM.