diff --git a/Reader/Screens/Items/ItemsViewController.swift b/Reader/Screens/Items/ItemsViewController.swift
index ee48b86..c64bb2a 100644
--- a/Reader/Screens/Items/ItemsViewController.swift
+++ b/Reader/Screens/Items/ItemsViewController.swift
@@ -104,10 +104,12 @@ class ItemsViewController: UIViewController {
         var snapshot = self.dataSource.snapshot()
         
         if let updated = updated {
-            snapshot.reconfigureItems(updated.compactMap { ($0 as? Item)?.objectID })
+            let knownUpdated = updated.compactMap { ($0 as? Item)?.objectID }.filter { snapshot.itemIdentifiers.contains($0) }
+            snapshot.reconfigureItems(knownUpdated)
         }
         if let deleted = deleted {
-            snapshot.deleteItems(deleted.compactMap { ($0 as? Item)?.objectID })
+            let knownDeleted = deleted.compactMap { ($0 as? Item)?.objectID }.filter { snapshot.itemIdentifiers.contains($0) }
+            snapshot.deleteItems(knownDeleted)
         }
         
         if let insertedItems = insertedItems {