Same for me though strange. I log in via Steam. Been joining World Boss Trains since I started like about 3.5 months ago once I hit 80 and was ok except occasionally lag spike when doing Jormag or Teq though recently (the last 2 weeks or so perhaps the influx of returning and new players with SOTD launches), I almost confirmed will lag badly when trying to join Teq Boss fight. I also was still OK when I join my guild's lead BLA and TM but again for the last 2 weeks, total lagged. For example, when the squad said "well done" meaning the fight is over, my "view" as the sub-group I was with the Boss still seems around 25%. I tried WTFast which now seems allowing me to join TT and Teq without issues but some instances (BLA Private Squad) and Guild Mission (so far 1 such cash), the game just refused to load with WTFast still connected and will crash out. Once I disconnect WTFast, I was able to join the instance but lag was super bad.