Possible to quit Psykhanium twice and crash the game

Issue Description: When you’re in the meat grinder bring up the menu to quit the Psykhanium, and while that quit request is loading/processing, you can bring up the menu again and exit, which causes the game to crash.

Steps to Reproduce:

  1. Go into Psykhanium
  2. Open the menu to quit Psykhanium, confirm quitting
  3. Quickly open the menu and quit the Psykhanium again
  4. Crash

Mission Name (If Applicable): Psykhanium

Platform: Steam