diff --git a/litellm/router.py b/litellm/router.py
index 1ad36049c4d..29025ad1437 100644
--- a/litellm/router.py
+++ b/litellm/router.py
@@ -7808,6 +7808,8 @@ class Router:
                         _deployment_mode,
                     )
                 _shared_model_info["mode"] = _existing_shared_mode
+
+            # Always register the (possibly mode-preserved) shared backend info.
             _backend_alias_cost = {_model_name: _shared_model_info}
             if "responses/" in _model_name:
                 _stripped_model_name = _model_name.replace("responses/", "")