The hands were as shown.
N/S are red; E/W are green.
Dealer South. The bidding goes
P - 1♠ - 2♦ - 3♠
P - 4♠ - 4NT - P
5♦ - P - P - ?
At this point, East asks South what the 4NT meant and is told "A minor 2 suiter"
After thought, East doubles, which is passed out.
Before East leads, North corrects the explanation of the 4NT bid - he explains that it is not a minor 2 suiter but simply a bid requiring his partner to bid again. (Yes, it sounds strange - but then so was the 2♦ overcall)
The play is straightforward, N/S making 12 tricks for a large score.
E/W reserve their rights. The Director is playing (this is teams of eight) so a ruling is given at the end of the match.
East contends that with a correct explanation he would not have doubled and the score should be adjusted to 5♦ + 1
The ruling given was "no adjustment. East's double of 5♦ if the explanation given of the 4NT had been correct was a bad bid and East got what he deserved".
I have to say, I'd have ruled differently.
East's bid made not be the best judgement but it seems to fall well short of serious error or wild action.
I'd be grateful for the views of more experienced directors.