The Perk MYC is slightly bugged. It afflicts the exposed status effect but you don't hear the scream or a notification bubble at all.
The description of the perk does mention that the afflicted survivor screams. They do, but it's not like Dragon's Grip where it the scream is heard map-wide. I'm not sure if that's intentional, but that's how it's always been for Make Your Choice, as far as I know.
Can confirm. Survivors do not scream at all, used to be able to hear them, and now they don’t make a peep. Been a problem for two months now.