So I have an SMP with 1 other person, and we use ServerMiner as the host. It is my own modpack with a bunch of mods.
At first, the server was running super well, no issues whatsoever, but as we got more technologically progressed, whenever we were near eachother, the server would basically time out one of us. The RAM or CPU doesnt seem to spike, or it updates too slow to show. In the console it doesnt say the server cant keep up either, so I'm really stumped as to what is causing this. The huge lag effect is mostly random, but it also occurs whenever i punch him or vice versa.
The lag does NOT occur when we are far apart; the server runs really smoothly when we are apart.