v0.33.8

src/proxy/forward/success_prepare.rs

@@ -1,5 +1,10 @@
 {
-let origin_validation_headers = response.headers().clone();
+// Only a real cache revalidation needs origin headers after response rules.
+let origin_validation_headers = if revalidation_sent
+    && response.status() == StatusCode::NOT_MODIFIED
+{
+    response.headers().clone()
+} else { HeaderMap::new() };
 if let Some(exchange) = &exchange {
     exchange
         .upstream_status