Child Class Defaults reset to those of parents on Unreal Engine Application Opening/Closing

I set some class defaults in a blueprint for a bullet. I have some variables, such as Damage and Lifespan, that are inherited by its children. I want each child bullet to have a different lifespan, damage, etc., so I went into those child classes and changed their class defaults for those variables accordingly. However, whenever I close Unreal Engine and open it again later, those defaults get reset to what the parent bullet’s defaults are. This ONLY happens with the bullet class, not with any other classes with child blueprints. I have not found any other way to replicate it except for reopening Unreal Engine. Could anyone provide a solution/explanation?