Guild Wars 2

The error code is 7:11:3:191:101 if that helps. It seems to happen much quicker if I go into an instance; I was able to play in verdant brink for about 30 minutes earlier before it crashed, but after that its crashed every couple of minutes

I recently decided to come back to the game, to try the new Living World content. However, whenever I try to play the game, it loses connection to the server after a few minutes. The longest I have managed to stay connected was around 10 minutes, after which the game lags massively for a few seconds, then either disconnects and displays an error message on the character select screen. Sometimes the lag prior to the disconnect lasts a little longer
I have tried pinging the server (using the ip address from /ip), and my ping doesn’t seem to be bad; it consistently returned at about 51ms. I have also tried playing with my Firewall totally disabled, but this had no effect. I also tried using a separate shortcut with /clientport 80 added to the target line, but this similarly did nothing.
I was able to play with relative stability around the time of the HoT release, but haven;t really played since then

Is this a know issue, and are there any ways to fix it? Right now the game is basically unplayable