A 479MB update released alongside the game's launch on April 4, 2017. While official notes were sparse, community testing showed dramatic improvements in load times —reducing world loading by nearly half compared to the original Wii U version.
The game uses a unique middleware renderer not found in other Lego titles. When the Switch OS tries to call a specific crypto function that was modified in a newer update, the base NSP (1.0.0) fails to initialize the GPU. lego city undercover switch nsp update patched