i have a question

When no admins or mods are on obviously the server is shut down and the text is yellow, which indicates that a password is needed to get in, but sometimes the server is just gone from the server list unseen. Does anyone know why it disappears like this sometimes?

For example the server crashed this weekend so crown needed to fix it or something like that and the server was taken down from being hosted or played on.

Thanks, I was confused about that.