With the latest update (1.22), alongside some relatively minor changes, an entire sequence of rooms have been added just prior to the fight with Sura.

Whereas previously you'd be transported into the room with him, and would merely need to move up to initiate combat, you now start in a separate room below, and must fight your way through three unavoidable locking rooms that spawn various chaos minions. Once you finish those, there's another room with some traders, before finally reaching the teleport door that takes you to the original final room with Sura.

I've not attempted a speedrun through this segment, but it unavoidably adds a significant amount to the total time of any new runs in all the Chaos Trial categories, meaning no new runs can be competitive anymore.

I've added a clip of the new addition here, to show what all this adds. Not sure what this will mean for new runs and categorization, but it's a topic worth discussing: