To do this naturally, either you have used the Vitae Anchor upgrade twice (resurrection), or you have experienced a scene in which your identity has been uncovered. However, if you used the console to fully upgrade your character, it's possible you may have toggled Vitae Anchor upgrade above the number 1. Switching it back to 1 or 0 should fix it.
Unfortunately I can’t share a screenshot due to your discord server doesn’t support IOS which is the only thing I can use to access discord. It’s only Mikah , it’s the image part of her breasts that don’t change even when it says it’s reach P Cup as it still looks like her initial cup size when you first interact with her, it say P cup but still looks like her original D cup