The Quick Join Functionality connects me sometimes to an empty server even though other servers have players and spots left.
Quick Join connects me to empty server
Seems to be happening to me all the time these days, nearly never Quick Join a populated server… 
Same here. There is no sign it tries to consider the servers fetched from the masterlist.
Happens a lot to me as well. What seems to be happening is the server order shuffles about at the last second and you end up joining a different server to the one you had selected.
That would happen with the browser i.e. by the time you’ve decided to go for server X and double-click on it to join, the list refreshes and you end up clicking server Y (which is usually empty or halfway around the globe…). But the original issue is about Quick Join where you can’t select the server, the system does it for you.
You mean it’s actually possible to be put on a server with other players using the ‘quick join’? I have yet to see it happen (since a couple of updates ago!) 