I have two warehouses, Warehouse A and Warehouse B.  

When I create an MO for Warehouse A, the behavior that I want is for Odoo to only use components within Warehouse A to fulfill the MO.

But the behavior that I'm now seeing is that, if I create an MO for Warehouse A and Warehouse A is short on components, Odoo will create a stock move that pulls components from Warehouse B in order to complete the MO.  

My configuration looks to me like it should prevent that unwanted behavior:

Warehouse A is set to resupply only from Buy (not from Warehouse B).

There is a Manufacturing Operation Type for Warehouse A, and it uses a location within Warehouse A for the Source Location and Destination Location.

The Manufacture Route has separate rules for each Warehouse, set to use locations within the warehouse for the Source Location and Destination Location.

When I create the MO, I specify Warehouse A Manufacturing as the Operation Type, and I specify the Warehouse A Location as the Source for Components, but the MO is still setting up stock moves with both Warehouse A and Warehouse B in the "From" field.  

Weirder yet, the stock move record is showing Warehouse B in the "From" field but a location in Warehouse A in the Production Order/Components field.  And then when the MO is produced, the stock is coming out of Warehouse B.

Any ideas for what might be happening or the right steps to troubleshoot this one?