Following the 22/09/2022 maintenance, we have discovered the below issue in Friend Match.

・ If both users share the same IP address as a result of connecting to the same Wi-Fi network, the match will not start and cannot be played
This issue can be circumvented by not connecting your devices of choice to the same Wi-Fi network.

We will implement a fix to this issue in an upcoming update.
We apologise for any inconvenience this may cause.