I have traffic from many different countries in the world and normally my impressions/pageviews ratio is arround 2.5 - 2.9.
But since 16 Oct 2019 ratio for two specific countries(Russia & Ukraine) suddenly became extremely low often less than 0.9.
People there have more page views than impressions! Also page RPM and impression RPM for these two countries is now 6x less compared with years of historic data. Rest of the countries (like 80% of my remaining traffic) seems unaffected by this problem.
Looking back at my 5+ years AdSense history this never happened before. Any idea what it is?
Also I disabled auto ads everywhere even in labs but I still noticed that auto ads showed up in incognito mode and I had to manually remove cookies. I haven't seen them since but I am still worried