diff --git a/frontend/src/views/admin/PluginsView.vue b/frontend/src/views/admin/PluginsView.vue
index 6c78fc69e9..7fc17c9b43 100644
--- a/frontend/src/views/admin/PluginsView.vue
+++ b/frontend/src/views/admin/PluginsView.vue
@@ -380,6 +380,7 @@ const uiError = ref("");
 const iframeHeight = ref(640);
 const pluginFrameLoaded = ref(false);
 const pendingBridgeRequests = new Map<string, number>();
+let uiSessionVersion = 0;
 
 function errorMessage(error: unknown): string {
   if (typeof error === "object" && error !== null && "message" in error) {
@@ -523,6 +524,7 @@ async function testPlugin(plugin: PluginInstallation): Promise<void> {
 }
 
 async function openConfiguration(plugin: PluginInstallation): Promise<void> {
+  const version = ++uiSessionVersion;
   configPlugin.value = plugin;
   uiSession.value = null;
   pluginFrameLoaded.value = false;
@@ -531,14 +533,18 @@ async function openConfiguration(plugin: PluginInstallation): Promise<void> {
   uiError.value = "";
   iframeHeight.value = 640;
   try {
-    uiSession.value = await adminAPI.plugins.createUISession(plugin.id);
+    const session = await adminAPI.plugins.createUISession(plugin.id);
+    if (version !== uiSessionVersion) return;
+    uiSession.value = session;
   } catch (error: unknown) {
+    if (version !== uiSessionVersion) return;
     uiLoading.value = false;
     uiError.value = errorMessage(error);
   }
 }
 
 function closeConfiguration(): void {
+  uiSessionVersion++;
   clearPendingBridgeRequests();
   pluginFrameLoaded.value = false;
   configPlugin.value = null;
@@ -723,6 +729,6 @@ onMounted(() => {
 
 onBeforeUnmount(() => {
   window.removeEventListener("message", handleBridgeMessage);
-  clearPendingBridgeRequests();
+  closeConfiguration();
 });
 </script>
diff --git a/frontend/src/views/admin/__tests__/PluginsView.spec.ts b/frontend/src/views/admin/__tests__/PluginsView.spec.ts
index 3fa4a7ed29..2504964aa5 100644
--- a/frontend/src/views/admin/__tests__/PluginsView.spec.ts
+++ b/frontend/src/views/admin/__tests__/PluginsView.spec.ts
@@ -1,7 +1,11 @@
-import { flushPromises, mount } from '@vue/test-utils'
-import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { enableAutoUnmount, flushPromises, mount } from '@vue/test-utils'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 
 import PluginsView from '../PluginsView.vue'
+import BaseDialog from '@/components/common/BaseDialog.vue'
+import type { PluginUISession } from '@/api/admin'
+
+enableAutoUnmount(afterEach)
 
 const {
   listPlugins,
@@ -151,6 +155,60 @@ describe('管理员插件页二次验证', () => {
     expect(enablePlugin).toHaveBeenCalledWith(7, 100, false)
   })
 
+  it.each([7, 8])('keeps the latest session when reopening configuration for plugin %s', async (id) => {
+    let resolveOld!: (session: PluginUISession) => void
+    createUISession.mockReturnValueOnce(new Promise<PluginUISession>((resolve) => { resolveOld = resolve }))
+    listPlugins.mockResolvedValue([plugin, { ...plugin, id: 8, name: 'Other Transport' }])
+    const wrapper = mountView()
+    await flushPromises()
+    const buttons = wrapper.findAll('button').filter(item => item.text() === 'admin.plugins.configure')
+    await buttons[0].trigger('click')
+    wrapper.getComponent(BaseDialog).vm.$emit('close')
+    await buttons[id === 7 ? 0 : 1].trigger('click')
+    await flushPromises()
+    const currentURL = wrapper.get('iframe').attributes('src')
+
+    resolveOld({ url: '/obsolete-session', bridge_token: 'old', ui_bridge_version: 1, expires_at: '' })
+    await flushPromises()
+    expect(wrapper.get('iframe').attributes('src')).toBe(currentURL)
+  })
+
+  it('ignores an old session error while the reopened configuration is loading', async () => {
+    let rejectOld!: (error: Error) => void
+    let resolveCurrent!: (session: PluginUISession) => void
+    createUISession
+      .mockReturnValueOnce(new Promise((_, reject) => { rejectOld = reject }))
+      .mockReturnValueOnce(new Promise<PluginUISession>((resolve) => { resolveCurrent = resolve }))
+    const wrapper = mountView()
+    await flushPromises()
+    const button = wrapper.findAll('button').find(item => item.text() === 'admin.plugins.configure')!
+    await button.trigger('click')
+    wrapper.getComponent(BaseDialog).vm.$emit('close')
+    await button.trigger('click')
+    rejectOld(new Error('obsolete failure'))
+    await flushPromises()
+
+    expect(wrapper.text()).not.toContain('obsolete failure')
+    expect(wrapper.text()).toContain('admin.plugins.loadingUI')
+    resolveCurrent({ url: '/current-session', bridge_token: 'current', ui_bridge_version: 1, expires_at: '' })
+    await flushPromises()
+    await wrapper.get('iframe').trigger('load')
+    expect(wrapper.get('iframe').attributes('src')).toBe('/current-session')
+    expect(wrapper.text()).not.toContain('admin.plugins.loadingUI')
+  })
+
+  it('does not restore a session after the configuration dialog closes', async () => {
+    let resolveSession!: (session: PluginUISession) => void
+    createUISession.mockReturnValueOnce(new Promise<PluginUISession>((resolve) => { resolveSession = resolve }))
+    const wrapper = mountView()
+    await flushPromises()
+    await wrapper.findAll('button').find(item => item.text() === 'admin.plugins.configure')!.trigger('click')
+    wrapper.getComponent(BaseDialog).vm.$emit('close')
+    resolveSession({ url: '/closed-session', bridge_token: 'old', ui_bridge_version: 1, expires_at: '' })
+    await flushPromises()
+    expect(wrapper.find('iframe').exists()).toBe(false)
+  })
+
   it('上传插件通过 step-up 控制器执行', async () => {
     const wrapper = mountView()
     await flushPromises()