I had an analogous situation many years ago, in the round-robin of what was then the Rosenblum WC. I was playing a very complicated relay method. I don't remember the hand, but I held KQ10xx in spades, the heart K and a good hand.
Partner opened a natural 1
♣ and I started the relay sequence with an artificial 1
♦ response.
A very large number of calls followed, all alerted. My screenmate asked no questions until his last turn, when he asked for an explanation.
I told him that my partner had shown 3=3=1=6, with a specified number of controls, and either both the AK of clubs or neither of them, and so on. However, at one of his last calls he had shown me the heart K, a card at which I was looking, so I knew something had gone wrong.
As for my hand, I had shown nothing beyond the ability to keep relaying and, ultimately, the desire to play 6
♠ opposite the hand shown by partner.
I volunteered, probably inappropriately, that I had reason to suspect that partner and I were not on the same page, but I refused to say which bit of information had alerted me to that, and he didn't push it.
In any event, partner put down 0=3=3=7, which left me with some problems in the trump suit....and we were missing a side Ace as well. Down 5, fortunately nv.
Why is this analogous?
Because neither my explanations nor my partner's bids (which he accurately described to his screenmate) were 'wrong'.
This was in 1998, before smartphones and so on. I had gone to Europe the week before the tournament, on business. He had changed the system notes the day after I left and, as was his wont, had simply emailed me replacement pages, the changes being to this one relay sequence of 1
♣ 1
♦.
Under the old notes, the only ones I had, he had indeed shown the hand I described, but under his notes, he had shown the 0=3=3=7. We'd not discussed the fact that he had made changes....he assumed I knew, and I was blissfully ignorant.
What would the ruling have been, had they sought redress? After all, they could have doubled, tho we might then have run to 6N, the contract at the other table (yes, in WC play they reached 6N off 2 Aces....but that was better than our result

)
'one of the great markers of the advance of human kindness is the howls you will hear from the Men of God' Johann Hari