Proxied DNS CNAME target change - requests drop

Hi,

Has anyone seen a problem with making changes to the proxied CNAME target (for example updating the target with a new ELB address) that the requests drop? This is an API endpoint and not a web page.
The requests seems to drop at Cloudflare and we found no unexpected discrepancies between Cloudflare and the origin requests. We still continue to receive the traffic but overall requests drop as detected by the anomaly monitors.

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