M51 Yellowish display problem

Go to samsung smart switch and format your phone from there re install the OS. May be problem will solve or wait for the next official update from samsung

Dear Samsung Member,

Greetings from Samsung Customer Support!

As per your query, we request you kindly share the log file. Without a log file, we cannot analyze this issue. This will help us to further investigate and resolve this issue. However, we are taking your valuable feedback regarding the new software update.

To attach the log file: Samsung Members Application (Open Samsung Members Application > Support> Tap on error report > Type your query > Send).

Note: To ensure relevant log information is included in the error report, submit the report within 3 minutes of encountering the bug or error, and do not terminate (swipe away) the Samsung Members application until you are notified that the report has been sent. This can take up to 5 minutes.

Warm Regards,
Samsung Customer Support

Bai samsung walo ko mail karo

Here is the full story bro
https://r2.community.samsung.com/t5/Galaxy-M/M51-amoled-display-problem/td-p/14725758?src=ShareByUserCM
They will surely said you that you are only one who is facing this kind of problem, after update. So you have to pay the Screen replacement cost almost around 9k. But we are many people who have different kind of Screen problem after security update. So take some backup and then mail the Samsung CEO help desk with some photos, videos of the problem. Here are tons of reports and complain about m series screen problem but still they act like you are the only one who have this kind of problem. So welcome to the group...