I have a theory that the reason PRX stopped playing Haven is because it was Benkai's map.
Remember how forsaken said in the interview that he makes strats for Bind. So when we consider that there is a high chance Benkai was the one who prepped their Haven and he seemed to be comfortable calling on it and even win while trying new stuff. Just check their Haven match history from 2022 -23. They tried like 7+ variations and while keeping a pretty decent win rate
The simpler theory is that since its a 3 site map and with PRX's calling structure it would super difficult on the defense side for them to know where the pushes and pulls are happening