Fix your kittening EU server
I second this, Im currently in his party, and the lag spikes seem to occur every 2 to 5 minutes (randomly) and last roughly 10 seconds tops.
It is no personal connection issue because that throws you back to the login screen, where as now we simply desync and everything reappears after the time elapsed.
As an addition, this has been happening starting 2 weeks ago, and has considerably gotten worse unfortunately.
Look at this thread, it’s connected:
https://forum-en.gw2archive.eu/forum/game/gw2/at-least-make-your-game-work/first#post4309792