This will only get worse over time. I can only strongly recommend everyone to run their own DNS resolver: https://torrentfreak.com/google-cloudflare-cisco-will-poison-dns-to-stop-piracy-block-circumvention-240613/

There many advantages:

• Most DNS blocks won’t work on you
• Prevents your data from being sold to advertisers
• Technical glitches of the provider DNS affect you less