Marvin Scholz authored May 11, 2021 and David committed May 22, 2021

When checking for the number of sections in reloadDataForNotification
an index is compared to a count, so the count must always be larger
than the index, else the index points past the last available item
leading to an assertion like this:

  *** Assertion failure in -[_NSCollectionViewCore
  _endItemAnimationsWithInvalidationContext:tentativelyForReordering:
  animator:], …/UIFoundation/CollectionView/UICollectionView.m:7095

  *** Terminating app due to uncaught exception
  'NSInternalInconsistencyException', reason: 'attempt to delete section
  1, but there are only 1 sections before the update'