So me and my friends are working on a server and when I start the server and connect to it the chunks don't really load correctly and eventually the server times out. It might be the cause because some person had a chain command block summoning falling blocks or something but I don't know how to solve this. I already tried turning off commandblocks but the server still timed out. The issue might be something else but I'm not sure what it could be.
And when someone connects to the server and it times out for them the server still thinks they are connected so once you got disconnected you can't go into the server anymore unless you turn it off and on again but then it starts from the beginning again.
Can anyone please help?