An adjustment has been made so that the status of a job will be automatically adjusted when creating a credit note. Here is an example: 

Job A – status delivered – invoice for €100 – status invoiced (the job will be automatically placed on this status after creation of an invoice) – creation of a credit note for the full amount (€100) – the status invoiced will be restored to status delivered. 

So, if you create a credit note for the full amount of the invoice, the status invoiced will automatically be adjusted to the status that the job had before it was invoiced.