diff --git a/src/main/ipc/plugins-panel-document-lifetime.test.ts b/src/main/ipc/plugins-panel-document-lifetime.test.ts
new file mode 100644
index 00000000000..8646cc6790a
--- /dev/null
+++ b/src/main/ipc/plugins-panel-document-lifetime.test.ts
@@ -0,0 +1,207 @@
+import { EventEmitter } from 'node:events'
+import { mkdtemp, rm, writeFile } from 'node:fs/promises'
+import { tmpdir } from 'node:os'
+import { join } from 'node:path'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import { z } from 'zod'
+import { pluginManifestSchema } from '../../shared/plugins/plugin-manifest'
+import { panelSessionTokenSchema } from '../../shared/plugins/plugin-panel-bridge'
+import type { Store } from '../persistence'
+import { PluginContentVerifier } from '../plugins/plugin-content-integrity'
+import type { ValidDiscoveredPlugin } from '../plugins/plugin-discovery'
+import { PluginPanelController } from '../plugins/plugin-panel-controller'
+import { PluginPanelSessions } from '../plugins/plugin-panel-sessions'
+import type { PluginService } from '../plugins/plugin-service'
+
+const mocks = vi.hoisted(() => ({
+  handlers: new Map<string, (event: unknown, args: unknown) => Promise<unknown>>()
+}))
+vi.mock('electron', () => ({
+  ipcMain: {
+    handle: (name: string, handler: (event: unknown, args: unknown) => Promise<unknown>) =>
+      mocks.handlers.set(name, handler)
+  }
+}))
+
+const { registerPluginHandlers } = await import('./plugins')
+const roots: string[] = []
+const controllers: PluginPanelController[] = []
+const senders: EventEmitter[] = []
+const PREDECESSOR = 'orca-samples.predecessor'
+const SUCCESSOR = 'orca-samples.successor'
+const entrySchema = z.object({ html: z.string(), sessionToken: panelSessionTokenSchema })
+
+beforeEach(() => mocks.handlers.clear())
+afterEach(async () => {
+  for (const sender of senders.splice(0)) {
+    sender.emit('destroyed')
+  }
+  for (const controller of controllers.splice(0)) {
+    controller.dispose()
+  }
+  vi.restoreAllMocks()
+  await Promise.all(roots.splice(0).map((root) => rm(root, { recursive: true, force: true })))
+})
+
+async function plugin(id: string): Promise<ValidDiscoveredPlugin> {
+  const rootDir = await mkdtemp(join(tmpdir(), 'orca-panel-document-'))
+  roots.push(rootDir)
+  await writeFile(join(rootDir, 'panel.html'), `<h1>${id}</h1>`)
+  return {
+    pluginKey: `orca-samples.${id}`,
+    rootDir,
+    contentHash: null,
+    consentFingerprint: 'approved',
+    isDev: true,
+    manifest: pluginManifestSchema.parse({
+      manifestVersion: 1,
+      id,
+      publisher: 'orca-samples',
+      name: id,
+      version: '1.0.0',
+      engines: { orca: '>=1.0.0' },
+      pluginApi: 1,
+      contributes: { panels: [{ id: 'panel', title: id, entry: 'panel.html' }] },
+      capabilities: [{ kind: 'notifications:show' }]
+    })
+  }
+}
+
+async function harness(
+  options: {
+    beforeVerify?: (plugin: ValidDiscoveredPlugin) => Promise<void>
+    whenReady?: () => Promise<void>
+  } = {}
+) {
+  const plugins = new Map(
+    (await Promise.all([plugin('predecessor'), plugin('successor')])).map((entry) => [
+      entry.pluginKey,
+      entry
+    ])
+  )
+  const verifier = new PluginContentVerifier()
+  const verified: string[] = []
+  const panels = new PluginPanelController({
+    resolveApprovedPlugin: (key) => plugins.get(key) ?? null,
+    contentVerifier: {
+      verify: async (entry) => {
+        verified.push(entry.pluginKey)
+        const discovered = plugins.get(entry.pluginKey)
+        if (!discovered) {
+          throw new Error('Missing approved plugin')
+        }
+        await options.beforeVerify?.(discovered)
+        await verifier.verify(entry)
+      }
+    },
+    executeHostCall: async (pluginKey) => ({ ok: true, value: { pluginKey } }),
+    log: () => () => {}
+  })
+  controllers.push(panels)
+  const service = { panels, whenReady: options.whenReady ?? (async () => {}) }
+  registerPluginHandlers(
+    // oxlint-disable-next-line typescript/consistent-type-assertions -- SAFETY: registration uses this store only to subscribe to settings updates.
+    { onSettingsChanged: () => () => {} } as unknown as Store,
+    // oxlint-disable-next-line typescript/consistent-type-assertions -- SAFETY: panel handlers consume real controller and readiness members only.
+    service as unknown as PluginService,
+    null
+  )
+  return { verified }
+}
+
+function sender(id = 1) {
+  const contents = Object.assign(new EventEmitter(), { id })
+  senders.push(contents)
+  return contents
+}
+
+function invoke(name: string, contents: ReturnType<typeof sender>, args: unknown) {
+  const handler = mocks.handlers.get(`plugins:${name}`)
+  if (!handler) {
+    throw new Error(`Missing handler ${name}`)
+  }
+  return handler({ sender: contents }, args)
+}
+
+function open(contents: ReturnType<typeof sender>, pluginKey = SUCCESSOR) {
+  return invoke('readPanelEntry', contents, { pluginKey, panelId: 'panel' })
+}
+
+function action(contents: ReturnType<typeof sender>, sessionToken: string) {
+  return invoke('panelAction', contents, {
+    sessionToken,
+    action: 'notifications.show',
+    params: { title: 'Live panel' }
+  })
+}
+
+describe('plugin panel document ownership', () => {
+  it('preserves successor and sibling authority when a crashed document finishes loading late', async () => {
+    const entered = Promise.withResolvers<void>()
+    const blocked = Promise.withResolvers<void>()
+    await harness({
+      beforeVerify: async (entry) => {
+        if (entry.pluginKey === PREDECESSOR) {
+          entered.resolve()
+          await blocked.promise
+        }
+      }
+    })
+    const current = sender()
+    const oldRequest = open(current, PREDECESSOR)
+    await entered.promise
+    current.emit('render-process-gone')
+    const successor = entrySchema.parse(await open(current))
+    const other = sender(2)
+    const sibling = entrySchema.parse(await open(other))
+    await expect(action(current, successor.sessionToken)).resolves.toMatchObject({ ok: true })
+    blocked.resolve()
+    await expect(oldRequest).resolves.toBeNull()
+    await expect(action(current, successor.sessionToken)).resolves.toEqual({
+      ok: true,
+      value: { pluginKey: SUCCESSOR }
+    })
+    await expect(action(other, sibling.sessionToken)).resolves.toMatchObject({ ok: true })
+    expect(entrySchema.parse(await open(current)).sessionToken).toBe(successor.sessionToken)
+    current.emit('destroyed')
+    await expect(action(current, successor.sessionToken)).resolves.toMatchObject({
+      ok: false,
+      code: 'invalid_request'
+    })
+    await expect(action(other, sibling.sessionToken)).resolves.toMatchObject({ ok: true })
+    expect(current.eventNames()).toEqual([])
+  })
+
+  it('skips loading a request retired while plugin discovery is pending', async () => {
+    const ready = Promise.withResolvers<void>()
+    const { verified } = await harness({ whenReady: () => ready.promise })
+    const current = sender()
+    const pending = open(current, PREDECESSOR)
+    current.emit('render-process-gone')
+    ready.resolve()
+    await expect(pending).resolves.toBeNull()
+    expect(verified).toEqual([])
+    const successor = entrySchema.parse(await open(current))
+    await expect(action(current, successor.sessionToken)).resolves.toMatchObject({ ok: true })
+  })
+
+  it('does not issue a panel session after native owner destruction during a load', async () => {
+    const entered = Promise.withResolvers<void>()
+    const blocked = Promise.withResolvers<void>()
+    await harness({
+      beforeVerify: async () => {
+        entered.resolve()
+        await blocked.promise
+      }
+    })
+    const issue = vi.spyOn(PluginPanelSessions.prototype, 'issue')
+    const current = sender()
+    const pending = open(current)
+    await entered.promise
+    current.emit('destroyed')
+    blocked.resolve()
+    await expect(pending).resolves.toBeNull()
+    expect(issue).not.toHaveBeenCalled()
+    expect(current.eventNames()).toEqual([])
+  })
+})
diff --git a/src/main/ipc/plugins.ts b/src/main/ipc/plugins.ts
index 166f9ed46a2..1799cde774f 100644
--- a/src/main/ipc/plugins.ts
+++ b/src/main/ipc/plugins.ts
@@ -148,12 +148,12 @@ export function registerPluginHandlers(
       )
       await pluginService.whenReady()
       const parsed = readPanelEntryArgsSchema.parse(args)
-      const entry = await pluginService.panels.open(ownerKey, parsed.pluginKey, parsed.panelId)
-      if (!ownerLease.isCurrent()) {
-        pluginService.panels.revokeOwner(ownerKey)
-        return null
-      }
-      return entry
+      return pluginService.panels.open(
+        ownerKey,
+        parsed.pluginKey,
+        parsed.panelId,
+        ownerLease.isCurrent
+      )
     }
   )
 
diff --git a/src/main/plugins/plugin-panel-controller.ts b/src/main/plugins/plugin-panel-controller.ts
index a033e154694..739b10cff5e 100644
--- a/src/main/plugins/plugin-panel-controller.ts
+++ b/src/main/plugins/plugin-panel-controller.ts
@@ -50,10 +50,14 @@ export class PluginPanelController {
   async open(
     ownerKey: string,
     pluginKey: string,
-    panelId: string
+    panelId: string,
+    isCurrent?: () => boolean
   ): Promise<PluginPanelEntry | null> {
+    if (isCurrent?.() === false) {
+      return null
+    }
     const loaded = await this.load(pluginKey, panelId)
-    if (!loaded) {
+    if (!loaded || isCurrent?.() === false) {
       return null
     }
     return {