ya, i'm having the same problem for awhile, there is a post on the 19th of october that deals with this issue that may show that soe knows about this and is working on it, not holding my breathe. i have experiencing this for approx since last patch update. if i stay in one zone i can play all day ( yes i play that much, since not working atm ) however if i the more i zone the faster it happens, usually within a couple of hours. very frustrating since i play for long stints.