diff --git a/packages/web/src/main.ts b/packages/web/src/main.ts
index aaadf6f..3dfcd00 100644
--- a/packages/web/src/main.ts
+++ b/packages/web/src/main.ts
@@ -35,6 +35,8 @@ const target = document.getElementById("app")!;
 const page = location.pathname.startsWith("/watch/")
   ? import("./SharePage.svelte")
   : import("./App.svelte");
-page.then(({ default: Root }) => mount(Root, { target }));
+// A retired chunk resolves to nothing once the handler above has claimed it;
+// the reload is already on its way, so there is nothing to mount.
+page.then((m) => m && mount(m.default, { target }));
 // The hall-wide notice sits above the game, apart from it: every game of Kestrel's Hall shows the same one.
 mount(Announcement, { target: document.body, anchor: document.body.firstChild ?? undefined });