Bing de-indexed our site from search. Site Ranking Good in Google and All Content are genuine.

Bing have started indexing our site from yesterday , I guess.
Few days ago, we received a reply from bing webmaster team that our site still violates bing webmaster policy , and we should submit once it complies. We send a reply that we were unable to identify the issues and shared that users searching for us in bing.

We didn't changed anything or submitted any url , but it automatically have started indexing our site. 

I guess bing follow some social signal and also brand search volume.

Still many url not indexed , but indexed url getting rank as before I guess. 

Anyways problem solved. 🙂