It just DCed and kicked me out of the Trial of Chaos... twice?

I was just fighting Xyclucian, the Chimera after reaching it in the trial of chaos... and the game just froze, and DCed... I did that again thought the problem occurred from internet connection (which doesn't happen), but then... the same happened on the 2nd try??

Couldn't manage to save the image. It was saying something like "the trial is already on going" and can't get back to it.

Playing solo as well.