Tobyfox has released an emergency version 1.11 patch for Undertale on Nintendo Switch.
The patch fixes a bug that can lead to the accidental loss of save data if you don’t select a user when you start up the game. Once the patch is downloaded, you will no longer have to worry about it happening ever again.
The 1.11 patch for UNDERTALE for Nintendo Switch is now live! It fixes the bug involving user-selection mentioned here. https://t.co/ZEo9TXKdex
— UNDERTALE (@UnderTale) September 26, 2018