Mario Kart 8 received update 4.0.1 on October 13, primarily addressing game bugs. Notably, an issue has been fixed where Switch 2 players in online or wireless matches might encounter more obstacles or item boxes on the track than original Switch players. Both types of objects affect race progression.
This patch also fixes an issue where users registered on the host console could not be selected during online or wireless multiplayer sessions.
Additionally, an issue where some stardust particles failed to display while playing Wii Rainbow Road on Switch 2 has been resolved. The update also corrects a bug that caused the game to close unexpectedly under certain conditions.