Following the 09/22/2022 maintenance, we discovered the issue below 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 avoided 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 apologize for any inconvenience this may cause.