Yes. Once the fight ended, I got the cutscene with the rival with the awakened blade near the statue, got the powerup, walked to the checkpoint to save, entered the room with the warp point, tried to enter it to no avail, got back to the previous room with the rival gone and then tried wall jumping all over the two rooms to try to escape them.
As I said, I was able to use the two warp points before it, but then I couldn't use them to get back to where I was, so maybe the hardlock bug is linked to that.