Sumo Digital, the developer behind Sonic & All Stars Racing Transformed, have confirmed a Wii U patch is in progress.
The Wii U edition of the game has several features that aren't functioning correctly after an initial update - including Boost Challenges and a handful of mini-games exclusive to the system.
According to a Sumo Digital representative in NeoGAF, the patch to fix these issues was submitted to Nintendo before the weekend and should be available to users shortly.