I played countless games in the past where it says waiting for other players for about 10 minutes and then the session is no longer available. What is the cause of this?

see the dissconnect list thread. it says something in there.

I know some facts, that solve this problem a bit:

1. Don´t chat during games!
2. Don´t even press the start button if it is not your turn

If its not your turn just watch the next player, don´t enter menues or chat, profiles...

The problem is, if you enter, for example, the chat menue you activate a delay for all players and the system must wait till all players are syncron again.

once, it was a four match, and i had to wait about 20min for it to to say 'This Session is no longer available'

it is so stupid that problem is.