Branch subdomain on NetlifyDNS are not working (But preview does)

Recently switched on NetlifyDNS to be able to change my sites names when i need to without DNS issues but i actually can’t see my sites on branch domains. Accessing <branch>--<site-name>.netlify.app works fine but <branch>.<domain> doesn’t redirect anything
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Both on sidy-resident.netlify.app and sidy-business.netlify.app

https://github.com/netlify/bitballoon/issues/6522

Hi, @Sceat, yes, we are tracking an open issue where sites with custom domains which are subdomains of a root domain are not getting the SSL certificate updated to cover the branch subdomain.

If you see this again, please make a new topic in #admin asking us to correct it. Our support team has a workaround to correct the SSL certificate until the issue is fixed.

When I say "subdomains of a root domain " I mean custom domains like subdomain.example.com and not example.com where the branch subdomain will be something similar to branch.subdomain.example.com.

I see sidy-resident is already updated and I just corrected sidy-business now. If this need to be done for any other sites, please reply here (or make a new topic in #admin).