I left for around a year and came back to find that I can't navigate the Angmar zone without encountering intermittent black-screen events where my character keeps moving but the screen goes totally black for a few seconds (a dangerous combination). The zone was a little laggy at the time but this seems excessive. I haven't had this occur in any of the other areas to date, up to and including Moria, and I have a high-speed internet connection so the problem doesn't appear to be at my end. Any insights on this situation?