What happened to topics and posts?

It seems to me that I looked at some of topics yesterday and today and wrote in some of them and now they are not there.
Or I do not see them or I can not find them?
This morning I had 64 and now 55 posts.
It doesn't matter for posts, but whether these topics still exist?

I´ve noticed that too.

Looks like an older version of the database was restored