Company tree and default warehouse

I’m trying my hand on new V11 feature company tree. We have 1 parent company and 2 children companies, all of then using the same warehouse.
When I try to make a sales order for one of the child company, I have the “Delivery warehouse required for stock item xxx” error, and my warehouse is not available for item’s delivery warehouse.

Am I doing something wrong ? Shouldn’t child company use parent’s default warehouse ?

Thank you all for the great job on V11 !

No, warehouses are linked to different companies, which are separate legal entities.