Very new partnership, not much discussion about methods. South, who judged that things hadn't been going well so far, decided to open a weak NT on a 1-4-4-4 hand with singleton A. North, who judged that things hadn't been going well so far, decided to jump straight to 3NT rather than look for a ♥ fit. A spade was led and only 8 tricks materialised.
Opinions please!

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1NT* 3NT
*12-14