Color Grading - weird light leaks(waves) on one clips after the export

Hi everyone,

I hope you all are doing well and staying safe.

I got two strange issues that maybe you could help me fix.

First:

After I exported the video one of the clips got some weird light/color leaks on the skin. (Which are moving on a particular place, in the photo example you can see it in the shoulder area)

I have tried lowering down the sats and vibrance, coz I thought that maybe Ive used too much. But it didnt fix it

 In the Premiere I dont have them, only after the export.

Second:

Some of my night time clips which were quite dark from the start so I had to raise ISO which brought out a lot of noise and made me use denoiser after the export have light literally blinking on those clips like if the person would be watching a TV at nigh. The lights from the TV would give that effect ahhah 

Im working with BRAW footage and use QT Gamma Compensation LUT at the export

please let me know if anyone ever had such or

similar issues and if there is any way to

fix it or at least to make it better.

appreciate any advice