Bleeding to death causes zone to crash
If you get knocked down to the point of bleeding to death, you'll bleed to death forever, or the zone will crash. I noticed the zone crashes pretty much every time now on 7.0.813. Noticed m ostly with low lvl chars when they get hit with poison and get knocked unconcious by the poison effects. Also, falling in lava or drowning will cause this effect also. Dunno if the fact that its not a mob doing it to you makes a difference.