diff --git a/src/db-sessions.test.ts b/src/db-sessions.test.ts
new file mode 100644
index 0000000..3e2e84d
--- /dev/null
+++ b/src/db-sessions.test.ts
@@ -0,0 +1,28 @@
+import { beforeEach, describe, expect, it } from 'vitest';
+
+import {
+  _initTestDatabase,
+  deleteAllSessionsForGroup,
+  getSession,
+  setSession,
+} from './db.js';
+
+describe('session accessors', () => {
+  beforeEach(() => {
+    _initTestDatabase();
+  });
+
+  it('deletes owner, reviewer, and arbiter role-scoped sessions for a group', () => {
+    setSession('group-a', 'owner-session');
+    setSession('group-a:reviewer', 'reviewer-session');
+    setSession('group-a:arbiter', 'arbiter-session');
+    setSession('group-b', 'other-session');
+
+    deleteAllSessionsForGroup('group-a');
+
+    expect(getSession('group-a')).toBeUndefined();
+    expect(getSession('group-a:reviewer')).toBeUndefined();
+    expect(getSession('group-a:arbiter')).toBeUndefined();
+    expect(getSession('group-b')).toBe('other-session');
+  });
+});
diff --git a/src/db/sessions.ts b/src/db/sessions.ts
index e834992..07bf82a 100644
--- a/src/db/sessions.ts
+++ b/src/db/sessions.ts
@@ -141,8 +141,11 @@ export function deleteAllSessionsForGroupFromDatabase(
   groupFolder: string,
 ): void {
   database
-    .prepare('DELETE FROM sessions WHERE group_folder = ?')
-    .run(groupFolder);
+    .prepare(
+      `DELETE FROM sessions
+       WHERE group_folder IN (?, ?, ?)`,
+    )
+    .run(groupFolder, `${groupFolder}:reviewer`, `${groupFolder}:arbiter`);
 }
 
 export function getAllSessionsForAgentTypeFromDatabase(
diff --git a/src/runtime-state.test.ts b/src/runtime-state.test.ts
new file mode 100644
index 0000000..85323ce
--- /dev/null
+++ b/src/runtime-state.test.ts
@@ -0,0 +1,37 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+const db = vi.hoisted(() => ({
+  assignRoom: vi.fn(),
+  deleteAllSessionsForGroup: vi.fn(),
+  deleteSession: vi.fn(),
+  getAllRoomBindings: vi.fn(() => ({})),
+  getAllSessions: vi.fn(() => ({})),
+  getRouterState: vi.fn(() => ''),
+  setRouterState: vi.fn(),
+  setSession: vi.fn(),
+}));
+
+vi.mock('./db.js', () => db);
+
+import { createRuntimeState } from './runtime-state.js';
+
+describe('createRuntimeState', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it('clears role-scoped sessions from memory when allRoles is requested', () => {
+    const state = createRuntimeState();
+
+    state.persistSession('group-a', 'owner-session');
+    state.persistSession('group-a:reviewer', 'reviewer-session');
+    state.persistSession('group-a:arbiter', 'arbiter-session');
+    state.persistSession('group-b', 'other-session');
+
+    state.clearSession('group-a', { allRoles: true });
+
+    expect(state.getSessions()).toEqual({ 'group-b': 'other-session' });
+    expect(db.deleteAllSessionsForGroup).toHaveBeenCalledWith('group-a');
+    expect(db.deleteSession).not.toHaveBeenCalled();
+  });
+});
diff --git a/src/runtime-state.ts b/src/runtime-state.ts
index 536811c..597588e 100644
--- a/src/runtime-state.ts
+++ b/src/runtime-state.ts
@@ -48,10 +48,17 @@ export function createRuntimeState(): RuntimeState {
     groupFolder: string,
     opts?: { allRoles?: boolean },
   ): void => {
-    delete sessions[groupFolder];
     if (opts?.allRoles) {
+      for (const key of [
+        groupFolder,
+        `${groupFolder}:reviewer`,
+        `${groupFolder}:arbiter`,
+      ]) {
+        delete sessions[key];
+      }
       deleteAllSessionsForGroup(groupFolder);
     } else {
+      delete sessions[groupFolder];
       deleteSession(groupFolder);
     }
   };