When playing on 1.17 everything was working fine. No lag, nothing. However when I went to create a new world it was extremely laggy as the user interface was slow to show up, and buttons processed very slowly. It would take a long time then to generate a new world. When i logged on this world It was extremely laggy as I explored spawn, and new chunks (probably a correlation with the lag) I mainly think it is chunk lag as my old world I play on most of the time is relatively not laggy due to the chunks being so old.