Urgent help require - Google webmaster showing less url submitted

[Raman]

Hello webmaster,

We have google webmaster tool, I update it weekly, We have more than 14000+urls submitted in google and indexed 11000+, But today I saw
submitted urls 1469
indexed urls 11722

Why google showing less submitted urls as we have 14000+ actual urls in sitemap
Please check the attachement..

 

[CyberKing]

A potential Google update that found duplicate content is highly likely and dropped some pages...just a FEW

https://www.seroundtable.com/google-search-ranking-update-chatter-24500.html