                 }
                 
                 // check thumbnail
-                if isThumbnailChanged(changeDetails: assetsChangeDetails) {
+                if isThumbnailChanged(changeDetails: assetsChangeDetails) || isCountChanged(changeDetails: assetsChangeDetails) {
                     if let sortedIndex = sortedAlbumsArray[section].index(of: album) {
                         thumbnailUpdatedIndexPaths.append(IndexPath(row: sortedIndex, section: section))
                     }

            }
        }
        return authorizationStatus == .authorized
    }
    
    func isThumbnailChanged(changeDetails: PHFetchResultChangeDetails<PHAsset>) -> Bool {

                var removedAlbums = [PHAssetCollection]()
                var removedIndexesInSortedAlbums = [IndexPath]()
                for removedIndex in removedIndexes {
                    let albumToRemove = fetchedAlbumsArray[section].remove(at: removedIndex.row)
                    if let index = sortedAlbumsArray[section].index(of: albumToRemove) {
                        removedIndexesInSortedAlbums.append(IndexPath(row: index, section: section))
                    }
