Speed challenge bug

[dreadgame]

There is a bug that happened to me during the speed challenge in Plato, Lua Exterminate mission. I'm at the second part of the speed challenge with the ice and rising floors and what happened is I managed to get to the end just in time but the circle that you have to shoot didn't appear which made the platform to speed drift not go higher and the passage not open. I know I beat this room because I cannot repeat anymor where it should allow for repeats when you fail and it just open and I can move freely without the time sound in the background. Please fix this, the room is pretty rare to appear and the challenge not that easy(for me anyway).

I tried shooting anyway the place where the circle oughto appear but it doesn't do anything. The platform is still halway up and the passage not open.