Snippets suddenly stopped working

Hi all,

my code snippets are suddenly not replaced anymore since 2 days, on all of my websites. The strange thing is that no updates were done, so I’m afraid it’s a server-related issue.
So, my question is which change can trigger this. No error is appearing, the “Snippet-token” is just not replaced by the related code.

I already opened a ticket at the hosting-company.