But that's how it works. You should assume everything you've ever posted to another server could someday become public record. Especially with social media since it's being posted specifically to be viewed by others who may copy and redistribute that data at any time.
People redistribute snaps all the time even though they're supposed to "go away", yet people still use it.
People redistribute snaps all the time even though they're supposed to "go away", yet people still use it.