Produce Program (CHR) Vendor entity item import doesn't update Entity Item UOMs

Produce Program (CHR) Vendor Entity Item (VEI) import doesn't update Entity Item UOMs.
Import contains the following directives:

Directives on PurchaseUnit - {DefaultToReportingUnit}{UpdateEntityItem}{AddUOMMapping} 

Directives on StockTakeInner - {UpdateEntityItem}{AddUOMMapping}

However, StocktakeUnit1ID and ReportingUnitID do no get updated to PurchaseUnit
and StocktakeUnit2ID doesn't get updated to StockTakeInner in Vendor entity item import.

//Item example in CFA Staging:

select * from tbitem with (nolock)
where 
--itemid = 853
itemcode like '14846%'

select * from tbvendorentity with (nolock)
where entityid = 32

select StocktakeUnit1ID, StocktakeUnit2ID, ReportingUnitID, * from tbentityitem with (nolock)
where  itemid in 
(4038) and EntityID=32

A side note, StocktakeUnit1ID got updated to the desired only when

directive was included in Vendor item import.

The expectation is that Vendor entity import behaves the same as Vendor item import when the imports exists along with the directives.