No one knows for sure. This question is still not answered in the judiciary (of any country afaik) when it comes to cripto contracts and protocols. It is not as simple as "money wired to a wrong account", those protocols are based on smart contracts, and the concept that the code is the contract (something that also is not tested in court). So a bug in the smart contract code would be akin to signing a contract without properly reading it, and it ends up having a clause you didn't originally want (but you did sign), that kind of "buggy" contract may be 100% enforceable or not depending on the country and the situation.
Other analogy that may be relevant are cases where casinos had slot machines with bugs awarding more prizes than the casino intended. In some cases/jurisdictions the courts ruled in favor of casinos, that the money was awarded incorrectly and should be returned; but in other cases/jurisdictions favored the winner, saying that the winner did everything right according to the rules of the game and should keep the winnings.
Also the Pepsi 349 Scandal in the Philippines in 1992 comes to mind [1]. In that case courts side with Pepsi, but I suspect that money has some inertia in Judges minds, so it was easy to side with Pepsi when it haven't paid yet. I suspect that if all that money had actually been automatically transfered to the many winners, then Pepsi would have a much harder task to convince the judges to make everyone transfer the money back.
I'm going to add smart contact providers have a strong incentive not to get the concept of smart contact tested in court, as if invalidated it would render them unfit for their purported use.
Other analogy that may be relevant are cases where casinos had slot machines with bugs awarding more prizes than the casino intended. In some cases/jurisdictions the courts ruled in favor of casinos, that the money was awarded incorrectly and should be returned; but in other cases/jurisdictions favored the winner, saying that the winner did everything right according to the rules of the game and should keep the winnings.
Also the Pepsi 349 Scandal in the Philippines in 1992 comes to mind [1]. In that case courts side with Pepsi, but I suspect that money has some inertia in Judges minds, so it was easy to side with Pepsi when it haven't paid yet. I suspect that if all that money had actually been automatically transfered to the many winners, then Pepsi would have a much harder task to convince the judges to make everyone transfer the money back.
[1] https://en.wikipedia.org/wiki/Pepsi_Number_Fever