diff --git a/core/modules/layout_builder/src/Plugin/SectionStorage/OverridesSectionStorage.php b/core/modules/layout_builder/src/Plugin/SectionStorage/OverridesSectionStorage.php
index cde6f497c5..eb3e12ef9b 100644
--- a/core/modules/layout_builder/src/Plugin/SectionStorage/OverridesSectionStorage.php
+++ b/core/modules/layout_builder/src/Plugin/SectionStorage/OverridesSectionStorage.php
@@ -39,7 +39,7 @@
  *     "entity" = @ContextDefinition("entity", constraints = {
  *       "EntityHasField" = \Drupal\layout_builder\Plugin\SectionStorage\OverridesSectionStorage::FIELD_NAME,
  *     }),
- *     "view_mode" = @ContextDefinition("string"),
+ *     "view_mode" = @ContextDefinition("string", default_value = "default"),
  *   }
  * )
  *
diff --git a/core/modules/layout_builder/src/Plugin/SectionStorage/SectionStorageBase.php b/core/modules/layout_builder/src/Plugin/SectionStorage/SectionStorageBase.php
index 3937ea5bcf..0f8543336f 100644
--- a/core/modules/layout_builder/src/Plugin/SectionStorage/SectionStorageBase.php
+++ b/core/modules/layout_builder/src/Plugin/SectionStorage/SectionStorageBase.php
@@ -116,8 +116,8 @@ public function getContextsDuringPreview() {
     // view_mode is a required context, but SectionStorage plugins are not
     // required to return it (for example, the layout_library plugin provided
     // in the Layout Library module. In these instances, explicitly create a
-    // view_modecontext with the value "default".
-    if (!isset($contexts['view_mode']) || !$contexts['view_mode']->getContextValue()) {
+    // view_mode context with the value "default".
+    if (!isset($contexts['view_mode']) || $contexts['view_mode']->validate()->count() || !$contexts['view_mode']->getContextValue()) {
       $contexts['view_mode'] = new Context(new ContextDefinition('string'), 'default');
     }
     return $contexts;