Multiplayer with friend not working

[VoidsCalling]

Anyone have this issue too? I am in a party with a friend, but when they join a game, I am unable to join it with them! My friend is choosing a quickmatch option. For some reason, they are able to load into a match as the party leader, but It gives me a prompt asking if I want to join that match by pressing what appears to be a left arrow key icon, normally associated with the enter key. No matter what I do though, I can't seem to get into the match he is in, even though i'm in their party. I tried left arrow key, A, enter, delete..nothing works.