I overwrote the equipment set Shared stat "Class_Wizard_Start_Undead" and applied it inside my custom class file for the starting equipment in game, and the equipment preview in character creation...

Unfortunately, same exact problems still occur: the character preview for the class has an invisible body and no weapon (regardless of race; all race appearances are defined correctly in the class file) and the starting inventory is empty. As a sidenote, I am using a mix of equipment already existing in the game, and created equipment. Neither appear.

At this point, considering this a bug. A bug which I have no solution on...