test(e2e): drop the cycle route handlers before teardown closes the page

e2e/cycle-insights-mobile.spec.ts

@@ -175,6 +175,14 @@ test.describe("cycle + insights mobile smoke", () => {
     );
   });
 
+  // These handlers call route.fetch(), which needs a live page. Teardown can
+  // close the context while one is still in flight, and the rejected fetch
+  // then fails a test that had already passed. Drop the handlers first so
+  // nothing is left racing the close.
+  test.afterEach(async ({ page }) => {
+    await page.unrouteAll({ behavior: "ignoreErrors" });
+  });
+
   test("/insights has no horizontal scroll on Pixel-5", async ({ page }) => {
     await page.goto("/insights", { waitUntil: "domcontentloaded" });
     await page.waitForLoadState("networkidle");