diff --git a/frontend/src/components/admin/monitor/MonitorTemplateManagerDialog.vue b/frontend/src/components/admin/monitor/MonitorTemplateManagerDialog.vue
index 546568d4fe..f4943b375d 100644
--- a/frontend/src/components/admin/monitor/MonitorTemplateManagerDialog.vue
+++ b/frontend/src/components/admin/monitor/MonitorTemplateManagerDialog.vue
@@ -227,7 +227,7 @@
 </template>
 
 <script setup lang="ts">
-import { computed, reactive, ref, watch } from 'vue'
+import { computed, onBeforeUnmount, reactive, ref, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { useAppStore } from '@/stores/app'
 import { extractApiErrorMessage } from '@/utils/apiError'
@@ -287,6 +287,8 @@ const providerTabs = computed<{ value: Provider; label: string }[]>(() => [
 const activeProvider = ref<Provider>(PROVIDER_ANTHROPIC)
 const templates = ref<ChannelMonitorTemplate[]>([])
 const loading = ref(false)
+let listRequestId = 0
+onBeforeUnmount(() => { listRequestId++ })
 
 const templatesForActiveProvider = computed(() =>
   templates.value.filter((t) => t.provider === activeProvider.value),
@@ -354,14 +356,17 @@ function backToList() {
 
 // --- data fetch ---
 async function fetchTemplates() {
+  const requestId = ++listRequestId
   loading.value = true
   try {
     const { items } = await adminAPI.channelMonitorTemplate.list()
+    if (requestId !== listRequestId) return
     templates.value = items
   } catch (err: unknown) {
+    if (requestId !== listRequestId) return
     appStore.showError(extractApiErrorMessage(err, t('common.error')))
   } finally {
-    loading.value = false
+    if (requestId === listRequestId) loading.value = false
   }
 }
 
@@ -371,6 +376,9 @@ watch(
     if (show) {
       editing.value = null
       fetchTemplates()
+    } else {
+      listRequestId++
+      loading.value = false
     }
   },
   { immediate: true },
diff --git a/frontend/src/components/admin/monitor/__tests__/MonitorTemplateManagerDialog.requests.spec.ts b/frontend/src/components/admin/monitor/__tests__/MonitorTemplateManagerDialog.requests.spec.ts
new file mode 100644
index 0000000000..6811bb6b00
--- /dev/null
+++ b/frontend/src/components/admin/monitor/__tests__/MonitorTemplateManagerDialog.requests.spec.ts
@@ -0,0 +1,67 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import { enableAutoUnmount, flushPromises, shallowMount } from '@vue/test-utils'
+
+vi.mock('vue-i18n', async (importOriginal) => ({
+  ...await importOriginal<typeof import('vue-i18n')>(),
+  useI18n: () => ({ t: (key: string) => key }),
+}))
+enableAutoUnmount(afterEach)
+
+function deferred<T>() {
+  let resolve!: (value: T) => void
+  let reject!: (reason: unknown) => void
+  const promise = new Promise<T>((res, rej) => { resolve = res; reject = rej })
+  return { promise, resolve, reject }
+}
+
+import MonitorTemplateManagerDialog from '../MonitorTemplateManagerDialog.vue'
+const { list, showError } = vi.hoisted(() => ({ list: vi.fn(), showError: vi.fn() }))
+vi.mock('@/api/admin', () => ({ adminAPI: { channelMonitorTemplate: { list } } }))
+vi.mock('@/stores/app', () => ({ useAppStore: () => ({ showError }) }))
+const response = (name: string) => ({ items: [{ id: 1, name, provider: 'anthropic', body_override_mode: 'off' }] })
+function mountDialog() {
+  return shallowMount(MonitorTemplateManagerDialog, {
+    props: { show: true },
+    global: { stubs: { BaseDialog: { template: '<div><slot /></div>' } } },
+  })
+}
+describe('monitor template list requests', () => {
+  beforeEach(() => { vi.resetAllMocks() })
+  it.each(['resolve', 'reject'] as const)('ignores an old dialog request that %ss', async outcome => {
+    const old = deferred<ReturnType<typeof response>>()
+    list.mockReturnValueOnce(old.promise).mockResolvedValueOnce(response('current-template'))
+    const wrapper = mountDialog()
+    await wrapper.setProps({ show: false })
+    await wrapper.setProps({ show: true })
+    await flushPromises()
+    if (outcome === 'resolve') old.resolve(response('old-template'))
+    else old.reject(new Error('obsolete error'))
+    await flushPromises()
+    expect(wrapper.text()).toContain('current-template')
+    expect(wrapper.text()).not.toContain('old-template')
+    expect(showError).not.toHaveBeenCalled()
+  })
+  it('keeps the reopened dialog loading until its own request completes', async () => {
+    const old = deferred<ReturnType<typeof response>>()
+    const current = deferred<ReturnType<typeof response>>()
+    list.mockReturnValueOnce(old.promise).mockReturnValueOnce(current.promise)
+    const wrapper = mountDialog()
+    await wrapper.setProps({ show: false })
+    await wrapper.setProps({ show: true })
+    old.resolve(response('old-template'))
+    await flushPromises()
+    expect(wrapper.text()).toContain('common.loading')
+    current.resolve(response('current-template'))
+    await flushPromises()
+    expect(wrapper.text()).toContain('current-template')
+  })
+  it('does not report an error after closing the dialog', async () => {
+    const request = deferred<ReturnType<typeof response>>()
+    list.mockReturnValueOnce(request.promise)
+    const wrapper = mountDialog()
+    await wrapper.setProps({ show: false })
+    request.reject(new Error('closed dialog'))
+    await flushPromises()
+    expect(showError).not.toHaveBeenCalled()
+  })
+})