We had this auction at the weekend, the problem was the explanation of the 2♥ bid.
It was explained that it was "hearts and a minor", what it should have been explained as was 5 hearts and a 4-5 card minor (we play similar but this can be 4♥/5m in our case).
Where it caused a problem was the meaning of double, dummy has 3 hearts, partner the NT opener has 2, so if it's possible I have 4 hearts then X is 100% penalties. If it's known that overcaller has 5 then I can only have 3 so this has to be a "bid spades or take the money" type bid, and I don't make it. I doubled, back to partner who then asked and discovered that it did show 5♥ and pulled to 3♠, -1 on an unfortunate ruff, 3♥ was at least 2 down, so we lost out on the +200/300 we would have had with the correct explanation.
Director said "you should have checked", your fault, I said full disclosure should have applied.
I think I could have called the director when partner asked the question and had my bid back as he had not yet called, but he asked and then bid fast enough after the explanation that it didn't occur to me in time.