When you are waiting overnight with the delivery in the pending confirmation state , the database cleanup workflow which executes at 4AM by default may be is wiping off the temp tables associated with the delivery.
Thank you for the reply. What I have found is that , the issue is due to validity period set in Delivery . The Delivery Duration is set as 4h, which means after 4 hours system will not be able to send the delivery as the validity is expired.
The moment the validity expires system is promoting us to do start the analysis again. The clean up workflow is not really deleting and broad log or delivery here.