Process delivery modes batch job RetailDlvModeExplodeJob might be taking more time / significant time to execute in 10.0.9 version and you would need to update the below binary update to fix it.
Find the link here for 10.0.9 fix
And if you are already using 10.0.10 version then there is another link I have posted below for the binary update.
Find the link here for 10.0.10 fix
Hope this will help you if you face this issue.