TypeError: Argument 2 passed to Drupal\Core\Cache\Cache::mergeTags() must be of the type array, null given

Getting this error while reverting node revision in a cohesion content type where blocks can be embedded in content:

TypeError: Argument 2 passed to Drupal\Core\Cache\Cache::mergeTags() must be of the type array, null given, called in docroot/core/modules/block/src/BlockViewBuilder.php on line 50 in Drupal\Core\Cache\Cache::mergeTags() (line 57 of docroot/core/lib/Drupal/Core/Cache/Cache.php)