diff -u b/core/modules/contact/src/Access/ContactPageAccess.php b/core/modules/contact/src/Access/ContactPageAccess.php
--- b/core/modules/contact/src/Access/ContactPageAccess.php
+++ b/core/modules/contact/src/Access/ContactPageAccess.php
@@ -72,8 +72,9 @@
 
     // User administrators should always have access to personal contact forms.
     $access = AccessResult::neutral()->cachePerRole();
-    if ($account->hasPermission('administer users')) {
-      return $access->allow();
+    $permission_access = AccessResult::allowedIfHasPermission($account, 'administer users');
+    if ($permission_access->allowed()) {
+      return $access->orIf($permission_access);
     }
 
     // If requested user has been blocked, do not allow users to contact them.
@@ -94,7 +95,7 @@
       return $access;
     }
 
-    return $access->allowIfHasPermission($account, 'access user contact forms');
+    return $access->orIf(AccessResult::allowedIfHasPermission($account, 'access user contact forms'));
   }
 
 }
diff -u b/core/modules/field_ui/src/Access/FormModeAccessCheck.php b/core/modules/field_ui/src/Access/FormModeAccessCheck.php
--- b/core/modules/field_ui/src/Access/FormModeAccessCheck.php
+++ b/core/modules/field_ui/src/Access/FormModeAccessCheck.php
@@ -62,6 +62,7 @@
    *   The access result.
    */
   public function access(Route $route, RouteMatchInterface $route_match, AccountInterface $account, $form_mode_name = 'default', $bundle = NULL) {
+    $access = AccessResult::neutral();
     if ($entity_type_id = $route->getDefault('entity_type_id')) {
       if (!isset($bundle)) {
         $entity_type = $this->entityManager->getDefinition($entity_type_id);
@@ -76,21 +77,16 @@
         $visibility = $entity_display->status();
       }
 
-      $access = AccessResult::neutral();
       if ($form_mode_name != 'default' && $entity_display) {
         $access->cacheUntilEntityChanges($entity_display);
       }
 
       if ($visibility) {
         $permission = $route->getRequirement('_field_ui_form_mode_access');
-        $access->allowIfHasPermission($account, $permission);
+        $access->orIf(AccessResult::allowedIfHasPermission($account, $permission));
       }
-      return $access;
-    }
-    else {
-      // No opinion.
-      return AccessResult::neutral();
     }
+    return $access;
   }
 
 }
diff -u b/core/modules/field_ui/src/Access/ViewModeAccessCheck.php b/core/modules/field_ui/src/Access/ViewModeAccessCheck.php
--- b/core/modules/field_ui/src/Access/ViewModeAccessCheck.php
+++ b/core/modules/field_ui/src/Access/ViewModeAccessCheck.php
@@ -62,6 +62,7 @@
    *   The access result.
    */
   public function access(Route $route, RouteMatchInterface $route_match, AccountInterface $account, $view_mode_name = 'default', $bundle = NULL) {
+    $access = AccessResult::neutral();
     if ($entity_type_id = $route->getDefault('entity_type_id')) {
       if (!isset($bundle)) {
         $entity_type = $this->entityManager->getDefinition($entity_type_id);
@@ -76,21 +77,16 @@
         $visibility = $entity_display->status();
       }
 
-      $access = AccessResult::neutral();
       if ($view_mode_name != 'default' && $entity_display) {
         $access->cacheUntilEntityChanges($entity_display);
       }
 
       if ($visibility) {
         $permission = $route->getRequirement('_field_ui_view_mode_access');
-        $access->allowIfHasPermission($account, $permission);
+        $access->orIf(AccessResult::allowedIfHasPermission($account, $permission));
       }
       return $access;
     }
-    else {
-      // No opinion.
-      return AccessResult::neutral();
-    }
   }
 
 }
diff -u b/core/modules/system/tests/modules/entity_test/entity_test.module b/core/modules/system/tests/modules/entity_test/entity_test.module
--- b/core/modules/system/tests/modules/entity_test/entity_test.module
+++ b/core/modules/system/tests/modules/entity_test/entity_test.module
@@ -337,7 +337,7 @@
  */
 function entity_test_entity_field_access_alter(array &$grants, array $context) {
   if ($context['field_definition']->getName() == 'field_test_text' && $context['items'][0]->value == 'access alter value') {
-    $grants[':default']->forbid()->cacheUntilEntityChanges($context['items']->getEntity());
+    $grants[':default'] = AccessResult::forbidden()->cacheUntilEntityChanges($context['items']->getEntity());
   }
 }