Fix: Only override tmp store key

src/Plugin/SectionStorage/UserDashboardSectionStorage.php

@@ -109,7 +109,6 @@ class UserDashboardSectionStorage extends DashboardSectionStorage implements Tem
       $entity->loadOverrides();
       $contexts[Dashboard::CONTEXT_TYPE] = EntityContext::fromEntity($entity);
     }
-    $contexts['view_mode'] = new Context(new ContextDefinition('string'), $defaults['view_mode']);
     return $contexts;
   }
 
@@ -151,7 +150,7 @@ class UserDashboardSectionStorage extends DashboardSectionStorage implements Tem
    * {@inheritdoc}
    */
   public function getTempstoreKey() {
-    return $this->account->id();
+    return $this->getDashboard()->id() . '_' . $this->account->id();
   }
 
 }