Whenever i send an invite to anyone wether they are on my friends list or in my clan, they can never accept it. It always boots them back to the main menu and says session no longer available. I've had several of my friends tell me this happens to them whenever they accept my invites. The same happens to me as well when i try to accept invites. The only way to make invites work is to go back to a custom game and then go back into a multiplayer lobby. After you do that, invites work on PS3.
Anybody else having trouble with invites like this?