diff --git a/vendor/magento/module-elasticsearch/Model/Adapter/FieldMapper/Product/FieldProvider/StaticField.php b/vendor/magento/module-elasticsearch/Model/Adapter/FieldMapper/Product/FieldProvider/StaticField.php
index f1ba54bf7e58..e927aee01aac 100644
--- a/vendor/magento/module-elasticsearch/Model/Adapter/FieldMapper/Product/FieldProvider/StaticField.php
+++ b/vendor/magento/module-elasticsearch/Model/Adapter/FieldMapper/Product/FieldProvider/StaticField.php
@@ -150,7 +150,7 @@ public function getField(AbstractAttribute $attribute): array
             $fieldMapping[$fieldName]['index'] = $index;
         }
 
-        if ($attributeAdapter->isSortable()) {
+        if ($attributeAdapter->isSortable() && !$attributeAdapter->isComplexType()) {
             $sortFieldName = $this->fieldNameResolver->getFieldName(
                 $attributeAdapter,
                 ['type' => FieldMapperInterface::TYPE_SORT]
@@ -161,7 +161,8 @@ public function getField(AbstractAttribute $attribute): array
                 ),
                 'index' => $this->indexTypeConverter->convert(
                     IndexTypeConverterInterface::INTERNAL_NO_ANALYZE_VALUE
-                )
+                ),
+                'normalizer' => 'folding',
             ];
         }
 
@@ -188,6 +189,21 @@ public function getField(AbstractAttribute $attribute): array
             $fieldMapping[$childFieldName] = [
                 'type' => $this->fieldTypeConverter->convert(FieldTypeConverterInterface::INTERNAL_DATA_TYPE_STRING)
             ];
+            if ($attributeAdapter->isSortable()) {
+                $sortFieldName = $this->fieldNameResolver->getFieldName(
+                    $attributeAdapter,
+                    ['type' => FieldMapperInterface::TYPE_SORT]
+                );
+                $fieldMapping[$childFieldName]['fields'][$sortFieldName] = [
+                    'type' => $this->fieldTypeConverter->convert(
+                        FieldTypeConverterInterface::INTERNAL_DATA_TYPE_KEYWORD
+                    ),
+                    'index' => $this->indexTypeConverter->convert(
+                        IndexTypeConverterInterface::INTERNAL_NO_ANALYZE_VALUE
+                    ),
+                    'normalizer' => 'folding',
+                ];
+            }
         }
 
         return $fieldMapping;
diff --git a/vendor/magento/module-elasticsearch/Model/Adapter/Index/Builder.php b/vendor/magento/module-elasticsearch/Model/Adapter/Index/Builder.php
index d8fa1ae73657..4c973b487e27 100644
--- a/vendor/magento/module-elasticsearch/Model/Adapter/Index/Builder.php
+++ b/vendor/magento/module-elasticsearch/Model/Adapter/Index/Builder.php
@@ -88,6 +88,12 @@ public function build()
                 'tokenizer' => $tokenizer,
                 'filter' => $filter,
                 'char_filter' => $charFilter,
+                'normalizer' => [
+                    'folding' => [
+                        'type' => 'custom',
+                        'filter' => ['asciifolding', 'lowercase'],
+                    ],
+                ],
             ],
         ];