I saw a few of my static sites that are hosted on Cloudflare and few other auxiliary 3rd party services I use flapping back and forth on PagerDuty, but not all

I saw a few of my static sites that are hosted on Cloudflare and few other auxiliary 3rd party services I use flapping back and forth on PagerDuty, but not all of my Cloudflare sites triggered down. Is this just because the unaffected Cloudflare sites were not within the CIDR range affected?