I ran into a similar problem with snapshots of a forum and email server – if there are scheduled emails when you take the snapshot they get sent out again if you create a new test server from the snapshot. And similarly for the forum.
I’m not sure what the solution is either. The emails are sent via an SMTP so it’s not as simple as disabling email (ports, firewall, etc.) on the new test server.
The ideal scenario would be to download your data, then upload it to your own static website before deleting it.
Here’s an example of it: https://www.rareddit.com/
But you’d need a static site generator built to do that, and I haven’t been able to get a response from the person who made that website. I’ve tried posting about it elsewhere, and didn’t get any solutions.
It should be simple enough for someone to make a template or instructions or an SSG for people to use. Unfortunately, no one has.