The server restarts automatically if an hour has passed and there aren't any companies, so if it was around an hour in as you said, it may have been that the server failed to recognise that you had a company.
We had a bug like this that occured frequently around a year ago, but I haven't heard of it since.
I had a look through the logs, and you had a game around ten days ago where it looks like you just joined and then didn't do anything until the server restarted, so if this was the game you're talking about then it looks like that is exactly what happened.
As for what caused it I don't know unfortunately, thought that bug was fixed. Since this is the first I'm hearing of it, it's hopefully rare.