1♣ was announced as "could be two" (i.e. it's natural, non-forcing but could be a weak NT hand with only two clubs).
2NT was alerted. North asked and was told by East "both minors".
When West bid 3♥ East corrected her earlier explanation to "both majors".
Result: 4♥(W)=, lead ♣3, NS -420.
EW were a new partnership and had agreed to play "CRO", a variant of Ghestem in which 2NT shows both majors over a minor suit opener and both minors over a major. It seems they got their wires crossed when a possibly short club was opened.
What do you think the ruling should be? Should it be any different if East had not assumed it was the minors but admitted her uncertainty when first asked and said something like: "we play 2NT as both minors over a major and both majors over a minor, we haven't discussed if this applies over short minors"?