The cause of the issue appears to be related to the game's NSP file and how it's being handled by the Switch console. The NSP file is a container format used by Nintendo for digital distribution of games and DLC. When a user tries to update the game's DLC, the console may encounter an error, preventing the update from completing successfully.

PC Building Simulator on Nintendo Switch: Ultimate Guide to NSP, DLC, Updates, and Crash Fixes

Using tools like or Switch Army Knife (SAK) allows you to "bake" the update and DLC directly into the base game NSP.