When setting single field within vault, all other fields are unset

[simonsayscode]

In doing a partial update of a model with these example definitions:

   const encryptedFields = EncryptedField(Sequelize, 'your_key_here');

   // Further down...

    encrypted: encryptedFields.vault('encrypted_vault_example'),
    firstName: encryptedFields.field('foo', {
      type: Sequelize.STRING,
    }),
    email: encryptedFields.field('bar', {
      type: Sequelize.STRING,
    }),

It appears that when doing a Model.update it doesn't correctly fetch the existing encrypted value and then set a certain field, but instead overwrites the entire vault field with just what was updated.