@lubedandlost copying my reply from other thread
I have this issue as well connecting to EU servers. What's important to note is that the game worked flawlessly before this for months and randomly started happening maybe May 5th or 6th for me. It will sometimes play flawlessly, then sometimes get packet loss so severe that the game becomes so laggy that players are moving every few seconds then freezing for a few seconds. Frame rate stays fine, but player models and textures turn really really bad quality when this happens.
Things I've tried:
UOTrace - everything fine on my end, even tested when I'm getting the symptoms and I'm not seeing more than 2% packet loss.
Flushing DNS
Changing DNS
Restarting Router
Changing Router WiFi channel (and PLEASE do not tell me to go wired, my wifi isn't the problem, I have 0-1ms ping to my router and 0% packet loss, it's like 10 feet away)
UPnP is enabled
Changing in-game settings, graphic card settings
Playing on VPN closer to various servers (only makes it laggier)
Using phone as a hotspot
Running Adw MAlware bytes
IPconfig renew and release
Netwinsock reset
Looking at network adapter drivers
Endless speed tests to see if it's just the ISP spiking
Changing in-game servers endlessly to no avail
The game ran great 99% of the time until 10 days ago, other games run great, I can stream video, the game itself runs great maybe 25% of the time now. This is some floating variable and I think it's server side. I don't see how it could be on my side or even the ISP given the weird times that it happens. It can happen during really low traffic times for local traffic (past midnight or middle of work day).
My theory is that it had something to do with updates to the servers leading to S5 because that's when it started. Maybe servers been rotating in and out to be updated, maybe it's part of the update, I don't know. I wish it were client side, because then I'd fix it - however it's really weird that only some of us are affected and not others.