Bug at Google Indexing or Fault with my site?

My new blog post used to get indexed within a minute or two, then, a month back it started taking a few hours, now it's taking more than 24 hours or more and most of them don't index at all. Even if they do they are in specific counties. Sometimes I see my posts rank for the wrong keyword. There is no issue with the posts from 15 days back - no ranking drop whatsoever.

It's just the new posts that don't get indexed and all kinds of problems. In the search console, it says indexed, but they don't appear in the search. Sometimes they appear and then in the next search, they are gone.

Can someone help, please?

There is reports that google having indexing problem at the moment.