PIX Manager not working properly

According to the [IHE_ITI_TF_Vol2a.pdf#page=38|http://docs.medisys.com.my/framework/ihe_iti_tf/2018/IHE_ITI_TF_Vol2a.pdf#page=38] PIX Feed referenced standards is *2.3.1*. Please find [our feed message for Outpatient Register from EVSClient|https://gazelle.ihe.net/EVSClient/hl7v2Result.seam?&oid=1.3.6.1.4.1.12559.11.1.2.1.4.933596]. When we send it to the [PAM Simulator|https://gazelle.ihe.net/PatientManager]'s *PIX Manager* it's modified to [this message|https://gazelle.ihe.net/PatientManager/messages/messageDisplay.seam?id=289584]. In such situation would you please confirm us the business of [PAM Simulator|https://gazelle.ihe.net/PatientManager] for *PIX Manager*? Is it bug or feature?