Me and my friends all live in the same town, but I notice significant delays between the time a block breaks and the item appears, and between when I strike an enemy and it takes damage. None of my friends have this issue. Is this just a problem with my ISP? Is there any way to fix it?
It could be just issues on your own side. You can try checking speedtest.net or try pinging something such as google to see if there's something wrong with your end. Lower values are better. (<100ms) Windows: Open command prompt and type in ping [hostname]. Example: ping google.com Mac: Open terminal and type in the same thing.