diff --git a/homeassistant/components/frontend/__init__.py b/homeassistant/components/frontend/__init__.py
index b152b2d65d8..8c04e591968 100644
--- a/homeassistant/components/frontend/__init__.py
+++ b/homeassistant/components/frontend/__init__.py
@@ -530,8 +530,9 @@ class IndexView(web_urldispatcher.AbstractResource):
         """
         if (
             request.path != "/"
-            and len(request.url.parts) > 1
-            and request.url.parts[1] not in self.hass.data[DATA_PANELS]
+            and (parts := request.rel_url.parts)
+            and len(parts) > 1
+            and parts[1] not in self.hass.data[DATA_PANELS]
         ):
             return None, set()