I might be missing something obvious here, but I've got a control setup using the keyboard and joystick, but there doesn't seem to be a way to stop mouse movement steering the ship, so it keeps getting jostled and throwing off my flight path. If I go into the keymapping menu, there's nothing listed in the mouse column under movement, but it still controls the pitch and yaw.

I still want the mouse active in menus, including in-game ones like the inventory, I just don't want it to have any influence over the ship's heading.