Hello fellas, we were doing R5C1.
At one point, we wanted to clear a giant the stealthy way, but something weird happened.
When the player named Ambulance hitted him with his spear, it made a gigantic sound of a lock breaking and alerted every enemy in the room and some more after.
Even though the enemies ahead were in an alerted state, they didn't moved until we opened the doors.
Here's the clip of the funny bug happening (French peeps warning) : https://clips.twitch.tv/CoyFastOwlPeanutButterJellyTime-KaicX-FSSIVLC3Og
And you can see the enemies triggered further in the level in the replay here around 1:34:25 and after : https://www.twitch.tv/videos/2377889871
Nothing game-breaking, pretty weird and I don't know if anything similar has happened.
Cheers, and HF !