DNS seems not to be updated for all regions

Website, Application, Performance DNS & Network
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Hi Cloudflare support team,

We have this issue with Cloudflare CDN. Out domain is kyber.network and using a custom SSL certificate issued by Cloudflare.
We mapped the subdomain developer.kyber.network to 52.196.158.35 using an A record.
Yesterday, I deleted that A record and remap that subdomain using a CNAME recore which point to d1khr3ex61w5s1.cloudfront.net.
After that we encounter 526 SSL error in some regions (i.e. the US), and it works fine in some other regions (i.e. Vietnam).

We also have this scheme works fine on a development domain which use only Universal Cloudflare Cert.
We hope that Cloudflare support team can give us more insight about this issue.

Best regards,
Kyber team.

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A 526 would indicate your certificate on your server is not valid, however that should be everywhere or nowhere (unless you had some obscure configuration where you serve different certificates *) ).

http://sitemeer.com/#https://developer.kyber.network shows mostly 200s but also some 526s. I’d open a support ticket in this case.

*) Could that be the case with Cloudfront?

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