The King of Fighters XV has been updated to version 1.21 today by SNK. You can get the complete patch notes for this update here.
This new patch has implemented a number of changes. Firstly, it has resolved the issue with the game crashing when the player was attempting to join the lobby from a link invite or friends menu. This applied to the Steam version of the game. There are other fixes and improvements implemented too, in addition to various game balance tweaks.
The King of Fighters XV Update 1.21 Patch Notes
- Fix for game crashes
- Fix for the starting round positions
- Various tweaks to the abilities of characters
Here are the details on the new changes implemented in this update.