SharePoint on Prem: Newsfeeds not working as it should.

Hi,

I have a SharePoint on prem that contains several subsites. Each subsite has a News feed web part. In the root site there is , I Think, a web part that collect the news from the sites that the user choosed to follow. The problem is that no all news are being shown in the root site. I tested yesterday follow some news feeds and some worked directly and others not at all. Today some of them that worked yesterady are not working anymore. Its seems to be a random problem but I would like to be sure if it can be some kind of profile problem. 

Anyone that has been in the same situation Before that can give me some tips?

Best regards

Americo