Google is experiencing issues with indexing and serving new content in Google Search. News publishers have reported these issues starting at around 2pm ET. Google has acknowledged the problem and stated that they are working on identifying the cause. This may result in a decrease in traffic from Google Search for publishers who have published new content since 2pm ET. The issue seems to be related to serving rather than indexing. Google has confirmed that it is an indexing issue with new content.

source: Google having issues indexing new content for the past few hours