According to the server logs there was no lag on our side, so we can already exclude a bug in the code.
Most likely the connectivity at some point was bad, maybe packet drops. To find that out, we have to analyze your network connection to the emps server though. I see that the connection to google's nameserver is good, but that doesn't have to mean that the connection to the emps server is good. It's likely, but not guaranteed. Can you try to ping emps-world.net next time this happens? maybe also try 'tracert emps-world.net' which yields some more information.
Thank you.