I discovered this when I was making a new slot and was able to replicate the bug on another account. It’s minor but a glitch nonetheless.
This involves the new return to main menu feature. If you still have an open slot, first go onto one of your old slots then return to the menu to create a new one. Clicking on the load button will show a copy of the slot you were just on (but it’s just a visual bug, the slots don’t actually get duplicated). When you try to play it, the game will skip character customization and go straight to the intro cutscene as the default character.
In both cases, I returned to the menu from my first slot and created a new character on the third one. Not sure if that has anything to do with it.