Issue #3262507: Unable to render EntityFields in views with search_api_opensearch

src/Plugin/views/query/SearchApiQuery.php

@@ -718,6 +718,22 @@ class SearchApiQuery extends QueryPluginBase {
 
       // Gather any properties from the search results.
       foreach ($result->getFields(FALSE) as $field_id => $field) {
+        // If the field id is one of the fields lazy loaded by ResultRow, do not
+        // copy the value onto the result row directly.
+        // @see \Drupal\search_api\Plugin\views\ResultRow::__get().
+        if (in_array(
+          $field_id,
+          [
+            'search_api_id',
+            'search_api_datasource',
+            'search_api_language',
+            'search_api_relevance',
+            'search_api_excerpt',
+          ]
+        )) {
+          continue;
+        }
+
         if ($field->getValues()) {
           $path = $field->getCombinedPropertyPath();
           try {