Snippet to detect adding tracking and change order status

Hi,

I’m facing an issue with the free app.
When i add tracking informations on my order, then the order is marked as completed and the client receive email with all details.

Sometimes, we have to send again order (order lost during transport). When i add another one tracking number in order, order status does not change because it’s already completed status.
This way, the client don’t receive the other tracking number.

Is there a hook that could detect new tracking number to add custom code please ?

Regards,