While running dungeons mainly occasionally I suffer from connection lost errors code 90002, also i have noted stuttering lag, where everything freezes for a split second then catchs up, this is quite a new issue perhaps a week or two old, it kind of co-insides with the NA data centre issue but Im residing on the EU data centre, also reading there it says some EU players have the same issue as me, i have no changes to my PC software/hardware
I play steam version on the PC with wired internet connection, i have also tried the internet explorer fix which was stated on there.