diff --git a/go_backend/extension_providers.go b/go_backend/extension_providers.go
index bed727bd..5f2f5dc6 100644
--- a/go_backend/extension_providers.go
+++ b/go_backend/extension_providers.go
@@ -1564,6 +1564,7 @@ func DownloadWithExtensionFallback(req DownloadRequest) (*DownloadResponse, erro
 				continue
 			}
 
+			req.OutputExt = ""
 			outputPath := buildOutputPathForExtension(req, ext)
 			if req.ItemID != "" {
 				StartItemProgress(req.ItemID)