Using gtag results in net::ERR_ADDRESS_UNREACHABLE on the collect endpoint

[CMCDragonkai]

I'm using docusaurus 2.2.0, and I've added my:

gtag: {
  trackingId: 'G-...',
  anonymizeIP: false,
}

And I can see the gtag running on the website.

However I can see on the console there's a failure:

What could be causing this?

[CMCDragonkai]

Seems like a temporary issue.