Deleting an entity with nested field collections causes EntityStorageException

I have a custom block with a field collection structure like the following:

• Field collection (unlimited)
  • Text field
  • Field collection (unlimited)
    • Text field
    • Text field

I can create a block instance, but when I try to delete it I get the following error:

Drupal\Core\Entity\EntityStorageException: Unable to save a field collection item without a valid reference to a host entity. in Drupal\Core\Entity\Sql\SqlContentEntityStorage->delete() (line 705 of core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php).

Drupal\field_collection\Entity\FieldCollectionItem->deleteHostEntityReference()
Drupal\field_collection\Entity\FieldCollectionItem->delete()
Drupal\field_collection\Plugin\Field\FieldType\FieldCollection->delete()
Drupal\Core\Field\FieldItemList->delegateMethod('delete')
Drupal\Core\Field\FieldItemList->delete()
Drupal\Core\Entity\ContentEntityStorageBase->invokeFieldMethod('delete', Object)
Drupal\Core\Entity\ContentEntityStorageBase->doDelete(Array)
Drupal\Core\Entity\EntityStorageBase->delete(Array)
Drupal\Core\Entity\Sql\SqlContentEntityStorage->delete(Array)
Drupal\Core\Entity\Entity->delete()
Drupal\field_collection\Entity\FieldCollectionItem->delete()
Drupal\field_collection\Plugin\Field\FieldType\FieldCollection->delete()
Drupal\Core\Field\FieldItemList->delegateMethod('delete')
Drupal\Core\Field\FieldItemList->delete()
Drupal\Core\Entity\ContentEntityStorageBase->invokeFieldMethod('delete', Object)
Drupal\Core\Entity\ContentEntityStorageBase->doDelete(Array)
Drupal\Core\Entity\EntityStorageBase->delete(Array)
Drupal\Core\Entity\Sql\SqlContentEntityStorage->delete(Array)
Drupal\Core\Entity\Entity->delete()
Drupal\block_content\Entity\BlockContent->delete()
Drupal\Core\Entity\ContentEntityDeleteForm->submitForm(Array, Object)
call_user_func_array(Array, Array)
Drupal\Core\Form\FormSubmitter->executeSubmitHandlers(Array, Object)
Drupal\Core\Form\FormSubmitter->doSubmitForm(Array, Object)
Drupal\Core\Form\FormBuilder->processForm('block_content_nir_faq_delete_form', Array, Object)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
call_user_func_array(Object, Array)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1)
Stack\StackedHttpKernel->handle(Object, 1, 1)
Drupal\Core\DrupalKernel->handle(Object)

I'm guessing that what's happening is that the top level field collection entities are getting deleted before the field collection entities that belong to it, with the result that those nested entities have a broken entity reference.