diff --git a/packages/client/ui-workflow-run/src/client/WorkflowRunPanel.tsx b/packages/client/ui-workflow-run/src/client/WorkflowRunPanel.tsx
index 59883e5ae6..f9d3adf294 100644
--- a/packages/client/ui-workflow-run/src/client/WorkflowRunPanel.tsx
+++ b/packages/client/ui-workflow-run/src/client/WorkflowRunPanel.tsx
@@ -85,7 +85,7 @@ function ManualDisclosure(props: StatusDisclosureProps) {
 }
 
 function StatusDisclosure({ cleanCycleKey, requiresExpansion, ...props }: StatusDisclosureProps & {
-  readonly cleanCycleKey: number
+  readonly cleanCycleKey?: number | undefined
   readonly requiresExpansion: boolean
 }) {
   if (!requiresExpansion) return <ManualDisclosure key={cleanCycleKey} {...props} />
@@ -139,7 +139,6 @@ function RunHeader({ children, count, name, requiresExpansion, status, t }: {
     <StatusDisclosure
       icon={<IconChevronRightOutline14 />}
       title={t('run.title', { name })}
-      cleanCycleKey={count}
       requiresExpansion={requiresExpansion}
       expandOnRowClick
       previewChevron={false}
diff --git a/packages/client/ui-workflow-run/tests/workflow-run.spec.tsx b/packages/client/ui-workflow-run/tests/workflow-run.spec.tsx
index 55ee32b8d1..e4fefa5ad7 100644
--- a/packages/client/ui-workflow-run/tests/workflow-run.spec.tsx
+++ b/packages/client/ui-workflow-run/tests/workflow-run.spec.tsx
@@ -377,7 +377,7 @@ describe('WorkflowRunPanel', () => {
     expect(screen.queryByText('未分阶段')).toBeNull()
   })
 
-  it('refolds when a complete activity cycle arrives as one clean update', () => {
+  it('refolds a phase when a complete activity cycle arrives as one clean update', () => {
     const firstMember = {
       seq: 1, label: 'first', childId: 'child-1' as SessionId, status: 'completed' as const,
     }
@@ -397,23 +397,6 @@ describe('WorkflowRunPanel', () => {
     expect(screen.getByRole('button', { name: /未分阶段/ }).getAttribute('aria-expanded')).toBe('false')
     expect(screen.queryByText('first')).toBeNull()
     expect(screen.queryByText('second')).toBeNull()
-    phaseView.unmount()
-
-    const workflowClean: WorkflowRunChatData = {
-      name: 'workflow-cycle', status: 'completed',
-      phases: [phase({ members: [firstMember] })],
-    }
-    const workflowView = render(<WorkflowRunPanel {...panelProps(workflowClean)} />)
-    fireEvent.click(screen.getByRole('button', { name: /^workflow-cycle/ }))
-    expect(screen.getByText('未分阶段')).toBeTruthy()
-    workflowView.rerender(<WorkflowRunPanel {...panelProps({
-      ...workflowClean,
-      phases: [phase({ members: [firstMember, {
-        seq: 2, label: 'second', childId: 'child-2' as SessionId, status: 'completed',
-      }] })],
-    })} />)
-    expect(screen.getByRole('button', { name: /^workflow-cycle/ }).getAttribute('aria-expanded')).toBe('false')
-    expect(screen.queryByText('未分阶段')).toBeNull()
   })
 
   it('derives the zero-member running and completed states from the current run status', () => {