Related sloresponse records deleted on close of IM


In our environment (SM9.40 PD), when we close an IM, all it's related sloresponse records get deleted.  HP have told me that OOB that does not happen, so I have sent them a trace to see if they can figure out why it is happening for us.  I thought I would also check here to see if anyone has already come across this issue and knows the answer.

In my trace I can see that it is happening based on the sla.delete.sloresponse RAD panel in the RAD app, but I still cannot trace back to see what the origins of the delete decision are.  I assume there is some setting, or configuration that says delete, or don't delete, but I could not find it in any obvious place.  Any help would be appreciated.