I've ran into this glitch about five times throughout two runs of the arena. I'd fight and fight and suddenly I can't block, attack, roll, or use skills. It lasts til I die, which is frustrating especially when it happens two seconds before I kill the final round boss, on top of armor repair costs. I'm wondering if anyone else is going through this. As many times as I've run into now I'd wager it's a really bad glitch that needs patching asap.