This crash wasn't happening on OBT because of low online or players wasn't using all functions.
All crashes that was on OBT was fixed during OBT.
About "disconnect the server and resolve issues" - what issues? We can't watch in future and understad what will happen. As everyone we can work only with existing problem. So we get crash, we check crash logs, understand what was the reason of it, create dll that fixing this reason.