Hiding the node title makes node form submission crash

Is this the same as ✨ Do not require a 'title' field Needs work ?

What I don't understand is how the same procedue on the Custom Block entity type does NOT crash, when both fields look very similar in their definition:

    $fields['title'] = BaseFieldDefinition::create('string')
      ->setLabel(t('Title'))
      ->setRequired(TRUE)
      ->setTranslatable(TRUE)
      ->setRevisionable(TRUE)
      ->setSetting('max_length', 255)
      ->setDisplayOptions('view', [
        'label' => 'hidden',
        'type' => 'string',
        'weight' => -5,
      ])
      ->setDisplayOptions('form', [
        'type' => 'string_textfield',
        'weight' => -5,
      ])
      ->setDisplayConfigurable('form', TRUE);

    $fields['info'] = BaseFieldDefinition::create('string')
      ->setLabel(t('Block description'))
      ->setDescription(t('A brief description of your block.'))
      ->setRevisionable(TRUE)
      ->setTranslatable(TRUE)
      ->setRequired(TRUE)
      ->setDisplayOptions('form', [
        'type' => 'string_textfield',
        'weight' => -5,
      ])
      ->setDisplayConfigurable('form', TRUE)
      ->addConstraint('UniqueField', []);

What is different?

The DB field in {node_field_data} does not have ALLOW NULL, but for {block_content_field_data} it does.

Understood. But with ✨ Do not require a 'title' field Needs work and its duplicates over the years, this seems the same issue.

Also, 🐛 Fatal error when title field is empty(Integrity constraint violation) Active .