Room where you first use the flares, noticed I couldn’t throw flares or objects through these windows(cracked or shattered completely) as I was trying to hit a headcrab scientist inside this room.
You can jump through the window, but flares can not go through.
map : bm_c1a1b at: -998 x, 2055 y, 352 z
Screenshot attached, but don’t think devs will need it.