the child bom manufacturing (dough) can be done by creating routes specifically for manufacturing of each product. and we need to define the locations for the same, for example in your case the flow of material shall be like

1. Manufacture route for dough 
2. 1. transfer of raw material from "wh/stock" to "dough pre-production" 
   2. dough manufacturing from "dough pre-production to "dough post production"

2. manufacture route for baguetter

​​a. transfer of dough finished goods from "dough post production" to "baguette - pre production"

a.1 ​additionally some of raw material transfer from "wh/stock to "baguette - pre production"

​b. baguette manufacturing: manufacture from "baguette - pre production" to "baguette - post production"

​c. transfer of baguette - finished goods from "baguette post production" for wh/stock

thereby the final finished product will be stored in wh/stock , the names within quotes denote the different locations to be created and routes and actions (push, pull, take from stock) and relevant operation types needs to be defined by you. odoo default routes, action , operation types will not solve your issue

I have the same problem.. did you find the solution?