Supplier Site Assignment not populating when enabling Opt in Feature

The Supplier Site Assignment tab fails to populate when creating a new supplier site for an existing supplier. This issue occurs when the "Approve Internal Changes on Supplier Profile" feature is enabled for Sites. As a result, internal profile changes are triggered twice, leading to two approval requests for the Internal Supplier Profile Change. However, when the Opt-in feature is disabled, the supplier site change approvals are not taken into consideration and it is auto approved.