Note 10+ faint pulsating pixel to the right of front camera while making a call ?

I see a faint pulsating pixel to the right of the front camera while making a call. I believe it might be the sensor that turns off the screen when you put the phone up to your ear?

It disappears when you put on speaker phone.

Am I the only one seeing this?

It's just the proximity sensor.
 
OK guys so I realised the sensor starts pulsation EVERY time when it is on AOD in bright light. In dimmed light it stops. What is this??
 
If I turn of adaptive light in AOD (not general screen) settings I get no pulsating anymore. Thinking it is not a bug but a feature.