Post: #2

unfortunately 56b is too unstable to use it today. It was the latest sphere about 5~9 years ago, but today it turned into a old obsolete version because after all these years tons of new bugs/exploits got found. Many bugs got fixed on 56c and many others got fixed on 56d. So 56b still vulnerable to all these bugs/exploits, while 56d is secure against all these bugs/exploits

anyway, you can try check if your sphere.ini have SaveBackground=0 because background save can corrupt the worldsave if for some reason the server crash during the background worldsave (which can last for more than 30min saving on background). But I'm quite sure your problem is not related to sphere worldsave, probably it should be someone abusing some kind of exploit, because here on brazil all servers have players that will spend 24hr/day searching new exploits just to bring the server down. That's why I always recommend all servers move to 56d, security is a must-have, not a optional feature