This was causing issues in which the last_child_created_at field for stream particles was slightly after the actual particle's creation time, and so comparing whether it's unseen merely via the playback markers would be inaccurate.
This was causing issues in which the last_child_created_at field for stream particles was slightly after the actual particle's creation time, and so comparing whether it's unseen merely via the playback markers would be inaccurate.