main story mission 19-11 is impossible to clear.

[vestal hill]

the mission becomes impossible after entering the room where you need to aim at the triangle. As soon as you enter the room and gravity becomes inverted, you are unable to access the menu with Esc and cannot leave the mission without closing the game.

the other reason that you cannot leave is shown below:

for some reason, aiming at the trianle is impossible, and aiming elsewhere also feels impossible because of invisible boundries in random spots.