diff --git a/plugins/woocommerce-blocks/src/BlockTemplatesController.php b/plugins/woocommerce-blocks/src/BlockTemplatesController.php
index df06d5faf16..e0904954735 100644
--- a/plugins/woocommerce-blocks/src/BlockTemplatesController.php
+++ b/plugins/woocommerce-blocks/src/BlockTemplatesController.php
@@ -324,8 +324,10 @@ class BlockTemplatesController {
 				}
 
 				if ( str_contains( $template->slug, 'single-product' ) ) {
-					if ( ! is_admin() && ! BlockTemplateUtils::template_has_legacy_template_block( $template ) ) {
-
+					// We don't want to add the compatibility layer on the Editor Side.
+					// The second condition is necessary to not apply the compatibility layer on the REST API. Gutenberg uses the REST API to clone the template.
+					// More details: https://github.com/woocommerce/woocommerce-blocks/issues/9662.
+					if ( ( ! is_admin() && ! ( defined( 'REST_REQUEST' ) && REST_REQUEST ) ) && ! BlockTemplateUtils::template_has_legacy_template_block( $template ) ) {
 						$new_content       = SingleProductTemplateCompatibility::add_compatibility_layer( $template->content );
 						$template->content = $new_content;
 					}