I have submitted a code-level support request, though I it's hard to imagine what I could be doing wrong in calling up the MatchMaker ViewController: GKLocalPlayer *localPlayer = [GKLocalPlayer localPlayer]; if (!localPlayer.isAuthenticated) { [self matchError]; return; } GKMatchRequest *request = [[GKMatchRequest alloc] init]; request.minPlayers = 2; request.maxPlayers = 2; // Configure other request properties as needed GKTurnBasedMatchmakerViewController *mmvc = [[GKTurnBasedMatchmakerViewController alloc] initWithMatchRequest:request]; mmvc.turnBasedMatchmakerDelegate = self; // Assuming self conforms to GKTurnBasedMatchmakerViewControllerDelegate mmvc.showExistingMatches = YES; // should be default, but maybe Jamie's problem? [self presentViewController:mmvc animated:YES completion:^{ // Code to run after the presentation completes (if any) NSLog(@"Presented GKTurnBasedMatchmakerViewController"); }]; }

While waiting to hear back on my code-level request, I did a debug build that called: [GKTurnBasedMatch loadMatchesWithCompletionHandler:^(NSArray<GKTurnBasedMatch *> *matches, NSError *error) { It showed that the matches ARE there, but the MatchMaker ViewController is not showing them!

At the moment, my workaround is to call loadMatchWithID after a 2-second delay if the match received by receivedTurnEventForMatch shows that the current participant is not the localPlayer.

Two-second delay seemed to work for awhile - I even saw it trigger the loadMatchWithID because it got stale data. Then, I even got stale data on a loadMatchWithID. Not sure how to proceed with this.