Problem
I have created three entities with the strategy InheritanceType.JOINED.
Parent entity looks like this:

@Entity
@Inheritance(strategy = InheritanceType.JOINED)
public class A<E extends AJsonContent>  extends AbstractDomainJsonEntity<E, String> {

  @Id
  @GeneratedValue(generator = "uuid2")
  @GenericGenerator(name = "uuid2", strategy = "org.hibernate.id.UUIDGenerator")
  @NotNull(groups = OnUpdate.class)
  @Null(groups = OnCreate.class)
  @Column(name = "a_id", columnDefinition = "VARCHAR(255)")
  @JsonProperty("aId")
  @Schema(description = "This attribute indicates unique id of OriginationJsonApplication")
  private String id;

  private String aAttribute;
}

The first child is:

@Entity
public class B extends A<BAttribute> {

  private String bAttribute;
}

The second child is:

@Entity
public class C extends A<CAttribute> {

  private String cAttribute;
}

Here parent has a column of jsonb type whose type is being passed by child entities using generics argument A<E extends AJsonContent> and argument should of subtype AJsonContent.

BAttribute and CAttribute are children of AJsonContent and they represent jsonb column.

Now, when bRepository.findById() is called, it returns an instance of B with jsonb column CAttribute instead of BAttribute.

When I removed C entity completely, then it is working fine. But when it B and C are both together it fetches the wrong jsonb column for the B entity.

What could be the reason for this behavior?