Why might a new virtual host not work on Ubuntu?

Question

ubuntu

There is a server (Ubuntu) and sites on subdomains are configured on it. Well, old sites work correctly, and when you add a new virtual host, it works every other time and when checking ip (when it doesn’t work), it gives some kind of left ip. Moreover, if you access the site through TOR, then the site is always available.

Answer 1

when checking ip (when it doesn't work) gives some left ip

Smoke towards NS-servers. For example, not an updated slave.