diff --git a/frontend/e2e/dashboard.spec.ts b/frontend/e2e/dashboard.spec.ts
index bcbf826..c0c53ed 100644
--- a/frontend/e2e/dashboard.spec.ts
+++ b/frontend/e2e/dashboard.spec.ts
@@ -142,6 +142,13 @@ test('manages a task and reads a real run log', async ({ page, request }) => {
   })
   await drawer.getByRole('button', { name: '关闭' }).click()
 
+  // 运行已结束时再打开日志，也要能回放（曾因 rAF 句柄未归零停在空态）。
+  await page.getByRole('button', { name: '日志' }).click()
+  const replayDrawer = page.getByRole('dialog', { name: 'E2E echo' })
+  await expect(replayDrawer).toBeVisible()
+  await expect(replayDrawer.getByText('e2e-output')).toBeVisible()
+  await replayDrawer.getByRole('button', { name: '关闭' }).click()
+
   await page.getByRole('button', { name: '编辑' }).click()
   const editor = page.getByRole('dialog', {
     name: '编辑任务 [e2e_echo]',
diff --git a/frontend/src/components/RunLogDrawer.tsx b/frontend/src/components/RunLogDrawer.tsx
index 6a8702c..6b01b7e 100644
--- a/frontend/src/components/RunLogDrawer.tsx
+++ b/frontend/src/components/RunLogDrawer.tsx
@@ -409,6 +409,10 @@ function RunLogOutput({
     return () => {
       if (frameRef.current) {
         cancelAnimationFrame(frameRef.current)
+        // StrictMode 会「挂载 → 清理 → 再挂载」，取消后必须把句柄归零，
+        // 否则下一次 scheduleRender 会误以为还有帧在排队而不再安排渲染，
+        // 已结束的 run（complete 在首帧就为 true）会一直停在「等待日志输出」。
+        frameRef.current = 0
       }
     }
   }, [])