Selecting music with added char slots for DLC chars cause inf load

[Demonslayerx8]

Selecting a vanilla or added song on SSS, then picking an added char slot, will make it inf load on VS screen, but if not selecting a song, then it'll work fine (via DLC char additions).

Vanilla char slot additions are fine with music selection. There's no crash report or any logs at all. Can be easily reproduced with ANY dlc character.