Issue #3320681 by scott_euser: Sometimes NULL values are sent to Core's Token...

Issue #3320681 by scott_euser: Sometimes NULL values are sent to Core's Token replacement service causing PHP8 notice

token_default.module

@@ -54,6 +54,7 @@ function token_default_tokens_alter(array &$replacements, array $context, Bubble
     return;
   }
   $replacements = \Drupal::service('token_default.manager')->replaceMissingTokensWithDefaults($replacements, $context);
+  $replacements = array_filter($replacements);
   // Allows using another token as replacement value but prevent endless loop.
   $recursive_calls = $context['data']['recursive_calls'] ?? 0;
   $recursive_limit = \Drupal::config('token_default.settings')->get('recursive_limit') ?? SettingsForm::DEFAULT_RECURSIVE_LIMIT;