When the Finance Users are Invoicing the Customer Orders something in their process is reopening and redelivering the Customer Order

The Steps they say they follow does not result in this when I am trying to replicate and they are unable to explain why their processing is different to my testing following the same steps.

Can anyone advise what process they would need to do to change the CO Status to Delivered after Invoiced? How is a Rental Reopened?

This is causing HUGE issues due to Custom Events we have that trigger on CO Status of Delivered so when they carry out these steps the Custom Event is retriggered meaning the Data in the system is incorrectly updated.

Thanks,