Note 9 Low Light Camera Issue

[kastron]

I found this issue when I was taking low light pictures. It's like pinkish noise on one of the sides. It is visible only in a low light situations.
I found many other pictures on google, even on sites that review smartphones, with the same issue.
It seems to always be on the same side of the sensor.
It's clearly visible when you turn up your screen brightness because it appears only in dark area like the sky.
Is it some defect?
Here is some sample pics as screenshots so it's more noticeable and you can see the contrast to pure black:

 

[Rukbat]

That's typical of digital photography with automatic settings. As the ISO goes up (and that's what the camera app is doing in dark scenes), the noise increases. There are a few ways of eliminating that (Pixel's Night Site, for example) but the easiest way of avoiding it without changing phones is to not have large dark areas in the picture. Get up closer or use a telephoto lens. (If you can find a manual camera app, keep the ISO down to normal - 800 or less. [And even that is for night-time photography. But you're probably getting an ISO in the thousands, which means noise.])

 

[kastron]

That's typical of digital photography with automatic settings. As the ISO goes up (and that's what the camera app is doing in dark scenes), the noise increases. There are a few ways of eliminating that (Pixel's Night Site, for example) but the easiest way of avoiding it without changing phones is to not have large dark areas in the picture. Get up closer or use a telephoto lens. (If you can find a manual camera app, keep the ISO down to normal - 800 or less. [And even that is for night-time photography. But you're probably getting an ISO in the thousands, which means noise.])

If this is a normal ISO noise why this is happening only on one side of the sensor (horizontal picture - upper part, verical picture - right side)
And I notice telephoto lens doesn't have this issue.
Here is what I mean:

 

[kastron]

Here is better pictures: