Not sure how cloudflare keeps struggling with issues like these, this isn't the first (and probably won't be the last) time they have these 'simple', 'deprecated', 'legacy' issues occuring.
8.8.8.8+8.8.4.4 hasn't had a global(1) second of downtime for almost a decade.
1: localized issues did exist, but that's really the fault of the internet and they did remain running when google itself suffered severe downtime in various different services.