RSSP - Preference - filter on Deliver to Location is gone

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RSSP - Preference - filter on Deliver to Location is gone

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Hi Experts,

May I ask if you can look into this, that back in Classic PR's Preferences, when a Requisitioning BU is selected, there's a filter applied on those Deliver-to Location, so that system would only brings out the available locations that is managed by that designed BU to be selected.

However, in RSSP, the filter is gone.
When the Requisitioning BU is selected, there are other Deliver to Location options in the list which should not be presented.
And the error comes up when end user trying to proceed - which the error message is very misleading.