diff --git a/addons/api/mirage/scenarios/default.js b/addons/api/mirage/scenarios/default.js
index f03170eb4..368d1299e 100644
--- a/addons/api/mirage/scenarios/default.js
+++ b/addons/api/mirage/scenarios/default.js
@@ -17,7 +17,7 @@ export default function (server) {
     'withChildren'
   )[0];
 
-  server.create('user', { id: 'authenticateduser' });
+  server.create('user', { id: 'authenticateduser', scope: globalScope });
 
   // Auth
   const globalAuthMethods = server.createList(
diff --git a/ui/admin/app/components/form/role/add-principals/index.hbs b/ui/admin/app/components/form/role/add-principals/index.hbs
index 9fa698c63..546ff86d8 100644
--- a/ui/admin/app/components/form/role/add-principals/index.hbs
+++ b/ui/admin/app/components/form/role/add-principals/index.hbs
@@ -62,9 +62,6 @@
             <row.cell>
               <ScopeBadge @scope={{principal.scopeModel}} />
             </row.cell>
-            <row.cell>
-              <ScopeBadge @scope={{principal.scopeModel}} />
-            </row.cell>
             <row.cell>{{principal.description}}</row.cell>
           </body.row>
         {{/each}}
diff --git a/ui/admin/app/routes/scopes.js b/ui/admin/app/routes/scopes.js
index 4f53d4955..d9ac05ba9 100644
--- a/ui/admin/app/routes/scopes.js
+++ b/ui/admin/app/routes/scopes.js
@@ -13,7 +13,12 @@ export default class ScopesRoute extends Route {
    * @param {string} params.scope_id
    * @return {Promise{[ScopeModel]}}
    */
-  model() {
+  async model() {
+    // Always preload the global scope, if possible, since the query below
+    // only fetches org scopes.
+    await this.store.findRecord('scope', 'global').catch(() => {
+      /* no op */
+    });
     // NOTE:  In the absence of a `scope_id` query parameter, this endpoint is
     // expected to default to the global scope, thus returning org scopes.
     return this.store.findAll('scope').catch(() => A([]));
diff --git a/ui/admin/app/routes/scopes/scope/groups/group/add-members.js b/ui/admin/app/routes/scopes/scope/groups/group/add-members.js
index 7629c17d9..4906130cd 100644
--- a/ui/admin/app/routes/scopes/scope/groups/group/add-members.js
+++ b/ui/admin/app/routes/scopes/scope/groups/group/add-members.js
@@ -26,11 +26,10 @@ export default class ScopesScopeGroupsGroupAddMembersRoute extends Route {
    * @return {Promise{GroupModel, [UserModel]}}
    */
   model() {
-    const group = this.modelFor('scopes.scope.groups.group');
-    const { scopeID: scope_id } = group;
     return hash({
       group: this.modelFor('scopes.scope.groups.group'),
-      users: this.store.query('user', { scope_id }),
+      // load all users from all scopes
+      users: this.store.query('user', { scope_id: 'global', recursive: true }),
     });
   }
 
diff --git a/ui/admin/tests/acceptance/authentication-test.js b/ui/admin/tests/acceptance/authentication-test.js
index df8b7ad9b..130a40d84 100644
--- a/ui/admin/tests/acceptance/authentication-test.js
+++ b/ui/admin/tests/acceptance/authentication-test.js
@@ -7,7 +7,7 @@ import {
   find,
   findAll,
   getRootElement,
-  //setupOnerror,
+  setupOnerror,
 } from '@ember/test-helpers';
 import { setupApplicationTest } from 'ember-qunit';
 import setupMirage from 'ember-cli-mirage/test-support/setup-mirage';
@@ -115,6 +115,9 @@ module('Acceptance | authentication', function (hooks) {
 
   test('visiting auth method when the scope cannot be loaded is still allowed', async function (assert) {
     assert.expect(1);
+    setupOnerror(() => {
+      // do nothing, otherwise an uncaught adapter error will fail the test
+    });
     this.server.get('/scopes', () => {
       return new Response(404);
     });