Why does my savegame reset my struct?

Development Pipeline & Plugins Editor Scripting
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7

My Savgame classes:
TitlesSaveGame.h

#pragma once

#include "CoreMinimal.h"

#include "GameFramework/SaveGame.h"
#include "Skillz/Constructors/Titles.h"

#include "TitlesSaveGame.generated.h"

class UTitle;
UCLASS()
class UTitlesSaveGame : public USaveGame
{
	GENERATED_BODY()
	
public:
	UPROPERTY(VisibleAnywhere, Category = Basic)
	TArray<TSubclassOf<UTitle>> AllTitles;
	UPROPERTY(VisibleAnywhere, Category = Basic)
	FCreatureStats Stats;
};

TitlesSaveGame.cpp is empty
The allready posted code is a mix of Titles.h and Titles.cpp.

Does it make a difference if i store the savegame instance instead of just storing the variables directly?