Anyone having BP duplication issues is not a direct result of this plugin.
It's due to a plugin you are running that kills the player OnDisconnected too early, resulting in the duplication occurring.
To fix, find the plugin and wrap the player.Die(); call in a NextFrame.

        private void OnPlayerDisconnected(BasePlayer player)
        {
            NextFrame(() =>
            {
                if (player == null)
                    return;
                player.Die();
            });
        }