Re: Mouse gets stuck in game
Do you happen to have any other peripheral attached to your PC while this BUG is active? Getting your Mouse and Keyboard to act weirdly may be related to another peripheral attached to your PC, which your game is somehow reading as a controller. Whenever the game reads an attached controller, it can enter a bad state where you can't use your Mouse and Keyboard properly unless you unplug the peripheral (and probably reset the game as well). It happened a lot to me back when I played Galactic Assault and changed to a controller whenever I decided to play in a starship.
Try unplugging any other peripherals while starting the game and see if that helps. If not, or if it's not your case, virtual controllers/joysticks can also produce the same undesired effects, so if you happen to have any of these active, disable them and then try to play the game to see the result.
I hope this helps. Be sure to come back and tell us if that helped you, and if it doesn't help, we can think of other ways to help you around here. Good luck!