On recent version just got a bug with Centaur spamming arrows infinitely. I was staying in block for quite some time to confirm the ammo isn't gonna end. Don't remember doing anything unusual, just hitting the Block button. A bit too fast perhaps.
I also remember Centaur arrow instakilling me, while the damage written in log was only 22, and I had 40+ HP. But that was on previous builds. I adopted Kneeling, and then boom — all health gone, no crits or anything.