diff -u b/src/Plugin/views/cache/SearchApiCache.php b/src/Plugin/views/cache/SearchApiCache.php
--- b/src/Plugin/views/cache/SearchApiCache.php
+++ b/src/Plugin/views/cache/SearchApiCache.php
@@ -139,7 +139,7 @@
   public function alterCacheMetadata(CacheableMetadata $cache_metadata) {
     // When additional access checks are executed, the cache has to vary
     // by user.
-    if (!empty($this->view->query->options['skip_access']) && $this->view->query->options['skip_access'] == FALSE) {
+    if (isset($this->view->query->options['skip_access']) && $this->view->query->options['skip_access'] === FALSE) {
       $cache_metadata->addCacheContexts(['user']);
     }
   }