Unable to upload different language versions of images with image field

Added inline images.

Fixed language-content tag

It turns out that it is possible to have different image files for each translation BUT only if "Alt" and "Title" attributes are left blank. Updating issue description.

Any clues why this is happening?

Comment Removed.

Once again fooled by virtually undebugable Entity class.

The problem seems to be that Node::values holds correct data but Node::fields holds broken data. They don't match and the data that is saved comes from Node::fields array.

This image shows kint dump of a node just before it gets saved with ContentEntityDatabaseStorage::doSaveFieldItems().

Below is the fragment of ContentEntityDatabaseStorage::doSaveFieldItems():

      $langcodes = $field->isTranslatable() ? $translation_langcodes : array($default_langcode);
      foreach ($langcodes as $langcode) {
        $delta_count = 0;
        $items = $entity->getTranslation($langcode)->get($field_name);

        // At this point we have broken data inside $items array!
        $items->filterEmptyItems();

        foreach ($items as $delta => $item) {
          // We now know we have someting to insert.
          $do_insert = TRUE;
          $record = array(
            'entity_id' => $id,
            'revision_id' => $vid,
            'bundle' => $bundle,
            'delta' => $delta,
            'langcode' => $langcode,
          );
          foreach ($field->getColumns() as $column => $attributes) {
            $column_name = static::_fieldColumnName($field, $column);
            // Serialize the value if specified in the column schema.
            $record[$column_name] = !empty($attributes['serialize']) ? serialize($item->$column) : $item->$column;
          }
          $query->values($record);
          $revision_query->values($record);

          if ($field->getCardinality() != FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED && ++$delta_count == $field->getCardinality()) {
            break;
          }
        }
      }