I get 1284ms ping on my own server. It was all fine until a update that i forgot what version it was. I could have ran the server fine but now I need to wait like 30 seconds for it to ping my server. It's really annoying and before that update users were not lagging when there were 1-2 players on the server but now 2 players seems to lag them like crazy. I heard about a update which syncs sounds with the server and I wondered if it was that. Btw, it should not be my internet connection because the two players are me and a guy that live relatively close to me. Is there a way to fix that "lag" or maybe it's a "bug"
Can you give us some more informations? Server specs, OS, plugin list, startup log, etc. Any errors in the console?