diff -u b/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTid.php b/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTid.php
--- b/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTid.php
+++ b/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTid.php
@@ -117,7 +117,7 @@
 
     $entity_ids = [];
     foreach ($terms as $term) {
-      $entity_ids[] = $term->id();
+      $entity_ids[$term->id()] = $term->id();
     }
 
     return $entity_ids;