Hello naughty dog!
I noticed something very weird while playing the hotel level (in the basement - before the part of the magnetic card). Everytime i was using the listening mode, these white dot appeared at the top of my screen.
I am playing with the physical version of the game and the patch 1.01 installed.
I am almost 100% sure it isn't a bug. Those white dots represent sounds that are further away from the actual listen mode's range; if you move your camera around you'll see the white dots moving along the top of the screen and pointing towards the sound. They were there before 1.02, too.
I have been getting this problem too - but usually only after playing the game for several hours. If my Ps3 fan starts to kick in to higher gear I usually start seeing these dots. I had assumed it might be due to overheating. I'll have to check some of those areas to see if I can get them to pop up while the Ps3 is still relatively cool.