title: GA4 - Server side tagging - (some) events are sent to region1.google-analytics instead of custom url
body: <p>I have set up server side tagging using GA4, it's working fine except for some events are being sent to region1.google-analytics.com instead of sst.my-custom-url.com that I've set up via google cloud.
  It only seems to happen with purchase for me. Is there any setting that I need to configure to prevent this behaviour?</p>
  <p>Url looks like this: <code>https://region1.google-analytics.com/g/collect?v=2&amp;tid=G-XXXXX...</code></p>