I have instrumented entity class with 2 lazy properties and @ManyToMany lazy association:

@Entity
public class HkvSubclass {
 
    @Lob
    @Basic(fetch = FetchType.LAZY)
    @Column(name = "CERTIFICATE_1")
    private String encodedCertificate1;

    @Lob
    @Basic(fetch = FetchType.LAZY)
    @Column(name = "CERTIFICATE_2")
    private String encodedCertificate2;

    @ManyToMany(mappedBy = "hkvSubclasses", cascade = CascadeType.ALL)
    @Fetch(FetchMode.SUBSELECT)
    private List<HkvDocument> hkvDocuments = new ArrayList<>(0);

// other properties...

If I update any lazy property (encodedCertificate1 or encodedCertificate2), Hibernate does not update it to database - it executes UPDATE, but without including the column(s) of updated property.

Update occurs only if I initialize all lazy properties: encodedCertificate1, encodedCertificate2 and hkvDocuments.

The culprit seems to be in AbstractEntityPersister#update method where it gets SQL update statements from getUpdateStrings() method (and accordingly the property list to use from method getPropertyUpdateability()) based on whether all lazy properties were initialized.