The item "Elva's Potion Notebook" that you get in act 3 of Monad can't be dropped from the inventory, which becomes a larger issue since each time you go back and complete the act 3 quest you receive the same item that also can't be dropped.
I've been experiencing somewhat similar issues for the past week, there's a consistent lag in both inputs and overall gameplay, when entering arcane force maps the message about the required force needed in the area doesn't go away, quest notifiers …