Data is not preserved when stored in Redis

I am using the lastest Redis.I saved a object called PostOwnership as below to a given key

public class PostOwnership implements Serializable {    @Id    @GeneratedValue    private Long id;    private final Long score;    @TargetNode    private final Post post;    public PostOwnership(Post post, Long score) {        this.post = post;        this.score = score;    }}

When saved to Redis, you can see that Post in PostOwnership has full of attributes:

But when I get by key from Redis, some of attributes in Post are no longer available.

Could you help me know what is this problem and the solution for it, bros?