@MojangSupport A certain minecraft world is laggy and delayed. But its only that one world. If I go into a different world it works just fine. Thoughts on fixing this issue?

Do you have any new builds in it that may be causing the lag and do you remember a time in which you didn't have the lag while playing the Realm? ^TK

Yes,I recently started this big house but I think it was laggy even before I started it. I don't have any farms with complicated redstone

If there was a lag before the big house it would point to interference between client and server. What troubleshooting steps have you tried and are you on Wifi or Hardwire? ^Tk

I usually close Minecraft then re-open it,turn off wifi and turn it back on,restart computer. I am usually always on Wifi but it lags even when im offline with no wifi and when im in a different city on a different network

Then It may be something within the world causing issues even when you're offline. If its a Realm do you have a backup before a time you realized there was lag?^TK

No,I didn't have a backup before it was laggy which I regret now. But I have a backup now while its still laggy

That's no good :/ Unfortunately, narrowing it down it sounds like it's likely the World and not the connection. I can't provide any troubleshooting steps to fix that :( ^TK

Would the updating of chunks work? Thanks for your help anyway