How do I reconnect to active Siebel session from an OPA iFrame?

While creating new record, we are opening an OPA interview session from the Siebel Application, upon closure of the OPA session, we navigate user to the specific view with record context.

We do this using open Ui (PM/PR). In most cases, this works fine but when two users close the OPA iFrame withing few seconds of each other, users some time lands on to the view with other users context.

We believe cause for this is: when we execute the PM/PR script, it is executed when we close the OPA window and does not have the Siebel session context.