I'm having a lot of window focusing issues in the Editor. E.g. If I click the Add Component button in the Inspector, the focus does not automatically go to the search text box. When I open the Package Manager or Tile Palette windows, I can't click on any items until I press a keyboard key first. Happens most times but not every time. Mouse movement in the Project or Tile Palette windows causes mouse movement events in the scene and Hierarchy windows. I.e. items in those windows become highlighted as if being moused over. It's as if the mouse event and relative position for the active window is being passed to all windows. I haven't been able to right click drag for days and just realised it's because it's stuck on the hand tool. Even if I click on the Rect tool, it jumps straight back to the hand tool. I just managed to get off this tool I think by pressing a key on the keyboard again. I'm on 2018.3.0f2 with Linux Mint 19 Cinnamon I just installed this same version in Windows and don't have any of these issues. Also don't have these issues in 2018.2.