After upgrading to 2021 R2 from 2020R2 the Non Stock Unit Cost in Kit Assemblies was no longer being populated for Kits with no Default Warehouse.  

It was working in 2020 R2.  Has anyone else noticed this?  Accounting noticed our COGS were off and this was the culprit.  

We want to leave the default blank for many items to force a selection when items are sold from and produced into different warehouses.

The Stock component Unit costs show as 0 initially for these products, but once the warehouse is selected the stock components unit costs update.  But not the non-stock.  This looks like a bug, I wonder if they replaced the calculated field with the upgrade.