It seems that the U.K. Parliament simply cannot make up its mind as to Brexit.
I am not saying that the members of parliament are not doing their jobs. I understand the complexity of the Catch-22 situation. It is simply not a question of whether or not to leave the European Union. There are too many parameters, and the sheer combination of them diversifies the "phase space" of possible options so that no single stance would be able to command a majority. It is such a kerfuffle.
When one cannot make up one's mind, the usual strategy is to keep the status quo. It is not a good idea to make any moves unless one is sure in which direction one is going. One would be advised to stay in the same position.
However, in this case, it is not entirely certain what the "status quo" actually means. You would think that remaining in the EU would be the "status quo." However, when you consider the result of the referendum in 2016, it might appear that leaving the EU would be the "status quo", or the default position.
So here's the heart of the current U.K. conundrum, from cognitive point of view. The situation is too complex to make a clear decision. Under such circumstances, normally, one would be advised to keep the status quo. However, it is not clear what the status actually quo means in this case, specifically, whether to leave the European Union or not.
The situation the U.K. parliament and Mrs. May are facing is actually more complex than the original Catch-22 situation. Fingers crossed that the peoples of the U.K. would somehow muddle through.