magento
diff --git a/‎app/code/Magento/CatalogGraphQl/Model/Resolver/Product/ProductCustomAttributes.php‎
Lines changed: 3 additions & 1 deletion b/‎app/code/Magento/CatalogGraphQl/Model/Resolver/Product/ProductCustomAttributes.php‎
Lines changed: 3 additions & 1 deletion
@@ -108,7 +108,9 @@ function (AttributeInterface $customAttribute) {
             }
             $attributeValue = $productData[$attributeCode] ?? "";
             if (is_array($attributeValue)) {
-                $attributeValue = implode(',', $attributeValue);
+                $attributeValue = (count($attributeValue) != count($attributeValue, COUNT_RECURSIVE))
+                    ? json_encode($attributeValue)
+                    : implode(',', $attributeValue);
             }
             $customAttributes[] = [
                 'attribute_code' => $attributeCode,
Original file line number	Diff line number	Diff line change
`@@ -108,7 +108,9 @@ function (AttributeInterface $customAttribute) {`
`108`	`108`	`}`
`109`	`109`	`$attributeValue = $productData[$attributeCode] ?? "";`
`110`	`110`	`if (is_array($attributeValue)) {`
`111`		`- $attributeValue = implode(',', $attributeValue);`
	`111`	`+ $attributeValue = (count($attributeValue) != count($attributeValue, COUNT_RECURSIVE))`
	`112`	`+ ? json_encode($attributeValue)`
	`113`	`+ : implode(',', $attributeValue);`
`112`	`114`	`}`
`113`	`115`	`$customAttributes[] = [`
`114`	`116`	`'attribute_code' => $attributeCode,`