SSL Issues on subdomain that managed in external provider

[dig]

@afnizarnur

I use SSL certificate that Netlify provide in the dashboard not in Cloudflare.

Cloudflare has nothing to do with the SSL on your site. You are only using Cloudflare for DNS.

@afnizarnur

using branch deploy

Branch subdomains are for use with Netlify DNS as noted in this documentation.

Reading through the follow support guide provides relevant information for your use case

[Support Guide] How to use Netlify’s branch deploy feature without Netlify DNS

Last reviewed by Netlify Support Staff: August 2023 So - you’ve discovered the concept of branch subdomains and want to use them! But you can’t use Netlify’s DNS Hosting? Never fear, there is a way to do this and this post will explain how in detail! Please note, however, that going this route means missing out on single click setup and all the goodness it includes - for example, getting an SSL certificate configured automatically. We also have Automatic Deploy Subdomains, which allows users …