I have an issue that when I run a Minecraft server and friends try to join me from their home, the connection is absolute garbage. It takes a while to load the map and inventory... NPC's don't walk anymore... etc. .
So this is the setup:
I host a server on my own PC. The specs of my PC are an i5-9600K, 16GB RAM and an RTX2070s.
The connection is done by port forwarding so people from outside my local network can connect to my PC.
I do this so we have our own personal little survival server to play Minecraft together.
This has worked for years up until a few months ago.
I don't know if this has anything to do with it but I think the issue started occurring right around the same time that I got a new PC. On my previous PC it always worked fine.
People are able to connect and the server registers that but once they are, their connection is horrible and get kicked after a while.
Interesting to note is that the server works fine for when I try to connect to my server via my local IP address from within my local network. So locally it works fine. But from the moment that people try to connect to my server from the WAN side, nothing works.
It's not another persons network because it is when the connection is from anywhere outside my network that I experience the problem. When I try to connect to my server with my own WAN IP (So basically going outside of my network, just to connect with my pc again), it also happens.