"We're working on some solutions but it's a complicated issue as there isn't any one problem; it's a combination of factors. Clearly, scale is one of them as we've had millions of successful matches played online so far, [but] a small percentage of players are having issues, which is unacceptable.

"We're working closely with Microsoft to address the matchmaking issues, I promise you that it is our number one priority, and we hope to have an update soon," he said.