This problem is not difficult and I think, you write about it often using wrong arguments. If South grants through his behavior any illegal information that still needs to be interpreted correctly and North among the various possible alternatives would find the right one, it is a matter of Judging ...
Three years ago I sent a letter to the whole bridge company to say that in this game a lot of things go wrong, many couples play dirty and the only way to get Bridge clean is another organization of the tournaments that make it impossible being able to play ...