Started by Svann back in December but I'm not sure if it ever got posted here. https://forums.daybreakgames.com/eq/index.php?threads/mouse-control-problem-getting-worse.245632/ Issues with turning with mouse and having game freeze until you release mouse buttons, then you end up with viewpoint being straight up or down when it unfreezes, usually you have completely swapped direction also from where you were facing.
Don't know if it is related but noticed when playing in windowed mode moving the mouse to another window is causing EQ to 'pause' briefly. Which it never used to do. It's like it stutters when the game loses focus.