As the title says, I play on Xbox One on the North American megaserver. When running vet Dragonstar Arena, my friends and I almost always encounter a weird bug on the stage 9 boss - Vampire Lord Thisa. Her charge telegraph (or the ability itself) seems to be broken. She can rear back to charge, displaying the red rectangle facing directly in front of her, then turn and charge in a different direction. For instance, if she is facing North and preparing to charge, she can instead charge off to the left or to the right, even diagonally. I have seen this happen multiple times and have managed to record it on my xbox, but I don't know how of a way to share that video. These pictures don't show an extreme case (like when she charges in the completely opposite direction) but it should still be enough to verify what I'm saying.