Ohhhhh, that’s why. I thought I do something wrong and when I start to aiming survivors they can see me and turn their light off.

I play on PS5.
The same happens with my own character after switch between 1st an 3rd person views. Or after start or finish of using gun scope. I’ve noticed that it happens with different cloths and backpacks. Often it makes impossible to look through scope and it costs you your character’s life.