1NT was announced as 12-14. 2♥ was a transfer [shown on the CC] but West forgot and did not alert.
After the hand North said he bid 3NT on fairly minimal values because of his good hearts, but would have passed 3♣ if he had known East had spades. 3NT went off on a spade lead.
Well?

Help

------------P---P
-1NT-Dbl-2♥-3♣
---P--3NT-P---P
---P