It's not semantics, there's a massive difference between something being postponed and something being cancelled. Postponed would mean that the fight would definitely happen later and there is zero evidence that is the case. Even in articles that you've linked it says that the fight isn't certain to happen now unless they reach an agreement. The whole point of the ordered rematch was that Fury 100% would fight for the WBC title - they either reached a deal, went to purse bids or Wilder vacated.Your arguing semantics they have not stated they have withdrew the offer or anything else they have just said it will happen at a latter date.
Unless the WBC come out and say that the fight is ordered to happen next, which is what they did to begin with, then the rematch has been cancelled. You can't have a ordered or mandatory fight at some random point in the future that either party can 'postpone' at the drop of a hat. It kind of defeats the object of ordering a fight