diff --git a/frontend/src/auth.ts b/frontend/src/auth.ts
index 56f3ee1..b0bcc97 100644
--- a/frontend/src/auth.ts
+++ b/frontend/src/auth.ts
@@ -54,11 +54,9 @@ export function getOidcConfig() {
 		stateStore: storage,
 		userStore: storage,
 		onSigninCallback: () => {
-			window.history.replaceState(
-				{},
-				document.title,
-				window.location.pathname + window.location.search,
-			);
+			// Remove the OIDC response params so a reload doesn't try to process
+			// the same callback twice and fail with a missing state entry.
+			window.history.replaceState({}, document.title, window.location.pathname);
 		},
 	};
 }