I have the solution to the yellowish / greenish screen. My note 9 started after this last update.

[Android Central Question]

My 14 year old solved my issue. Go to setting...then accessibility...then advanced setting.... NOW when you are here touch flash notification and turn it OFF. Worked for me

 

[mustang7757]

Thanks for the tip, if you like to register here I'll leave a link .https://forums.androidcentral.com/showthread.php?t=409154

 

[pizza_pablo]

My 14 year old solved my issue. Go to setting...then accessibility...then advanced setting.... NOW when you are here touch flash notification and turn it OFF. Worked for me

To what "yellowish - greenish screen" are you referring?

 

[B. Diddy]

Welcome to Android Central! Are you saying that this setting caused the screen to have a yellowish/greenish tint? Or was the screen flashing yellowish/greenish for notifications while the screen is off?