Thank you for looking into this Control.
PoK seems to run better now. At least I can zone through. HoH however, still stops working after a while. Right now, I am standing at the trial location and want to buff, but after a few casts (sometimes just 1), I cannot cast anymore. Quest giver Alkeson Garn doesn't respond to me. When I reboot or wait several minutes, he responds and I would be able to start the trial. However, soon after, the world stands still. Other zones, PoTactics e.g., work flawlessly.
The behaviour is not the same on all accounts. Some are more responsive, or at least, it takes longer until their world freezes. However, as long as my tank account doesn't work, I am sorta stuck, and currently I don't get response from the quest giver at all, even after a relog.