One of the nice things about hyperlobby was...

[CaptainDoggles]

No, I don't think I will.

Since I am not a developer I don't have access to the source code. Anything beyond "it's a bug" is merely conjecture on my part.

You don't know they "talked to each other"

You don't know they "decided to log off"

But you can infer from the fact that literally hundreds of games have working dedicated servers that it's not a problem with steam. It's a problem with this particular dedicated server. Use logic.