Post: #2

Probably it's the old infinite loop bug where an NPC cause damage to itself and keep trying to attack itself but it block the attack and then keep trying again on a infinite loop

It's already fixed since many years ago, but to get it fixed on your server you must use an build where this is already fixed, and unfortunately this is not fixed on old 56b builds. I highly don't recommend use old builds in any way, since old builds have some critical exploits where anyone can crash any server, and to keep the server secure against these lammers you must always have the latest fixes. That's why I always recommend use latest 56d builds which is much more stable/optimized/secure

So to officially get this problem fixed you must use at least 56c, which is also not recommended use it since it also still have some exploits, so the most secure and most recommended build is 56d

You can still using 56b and just create an event trigger to prevent chars cause damage to itself, this will fix only this problem but won't fix the many others. But it's better than nothing (lol)