Custom domain works only sometimes on some browsers

[coelmay]

@sandraguo

Is it possible that the nameservers were set up previously with Huawei Cloud, and would this cause any issues with setting the site up on Netlify?

Yes, nameservers where previously configured to point to Hauwei Cloud. If these were removed at the registrar when the Netlify DNS Nameservers were added then it is simply a matter of time, waiting for propagation to finish, though I do note you have waited for some 48 hours now. DNS Checker shows propagation on numerous DNS around the world see wolfpackgames.com @ DNS Checker.

@sandraguo

Is it possible that I am mixing the external DNS settings and Netlify DNS settings in a way that is causing the observed issue?

This is possible too. You need to decide weather external DNS or Netlify DNS is what you need/want (see [Support Guide] Should I use Netlify to manage my DNS?). Then follow the steps outlined in the relevant documentation (see external or Netlify documentation). Ensure the Namservers are correctly set at the registrar and then wait for propagation.

@sandraguo

but is this where I ought to put the A record and CNAME record, as it seems it did not set up from the external DNS?

The NETLIFY records are auto-generated when using Netlify DNS (see link above.) The only records (A/CNAME/MX) to configure in Netlify Domains section of the UI is those pointing to external services. Do not add A/CNAME records here pointing to the Netlify site.

@sandraguo

This does not quite explain why the site sometimes works. If it is totally not pointed in to the right place, then the domain should never reach the Netlify site, right?

The reason it may work sometimes is, as per DNS Checker above, some DNS are pointing to Netlify DNS, and as the domain is configured there, it loads. It depends on which region you are are and which DNS you hit.