Deltarune has been updated to version 1.04 today by Toby Fox. You can get the complete patch notes for this update from here.
Deltarune developer Toby Fox had updated the game to deploy a minor fix, but apparently, it has led to another bug so another patch might be released to resolve it. Get the details on this new update below.
Deltarune Update 1.04 Patch Notes
There is another patch coming according to Toby Fox.
Hey guys, we tried to update DELTARUNE on console, but it ended up making prior Chapter 2 save files load in the wrong place, or not at all. Working on a fix now, but it may take a while for the update to go through on Switch. Sorry for any inconvenience.