Magento v2.1.2 - Choosing a child theme for product page

[ChevCheusov]

The Magento only pulls through the styles from the child theme, and not the layouts. The XML files are pulled from the parent theme wich is wrong.

Preconditions

1. Install Magento 2.1.2 , PHP 5.6.29, MySQL 5.6

Steps to reproduce

1. Trying to setup a child theme specifically for some products. However, this doesn't contribute. Magento does not pull layout from the "child theme".
2. See the theme catalog structure:
   Master_theme
   -- theme
   -- Magento_Catalog
   -- layout
   -- catalog_product_view.xml
   Child_theme
   -- theme
   -- Magento_Catalog
   -- layout
   -- catalog_product_view.xml

Magento pulls the "catalog_product_view.xml" from the parent theme instead of child.
That is the problem!

Expected result

1. Magento pulls the "catalog_product_view.xml" from the child theme.

Actual result

1. admin panel --> product edit --> select design tab --> new theme --> select "child theme"
   http://dl3.joxi.net/drive/2017/01/30/0019/0670/1295006/06/d588e67506.jpg
   I chose the theme needed and save. But it does not help pulling layouts.

Additional information

Exactly the same bug was described here - http://magento.stackexchange.com/questions/145687/magento-2-v2-1-2-choosing-separate-theme-for-product-page
And the solution was not found.

[ChevCheusov]

The same bug is in the Magento 2.1.3.
Updating up to the latest release did not help.

[ChevCheusov]

Hello,
Magento
Is there any news on the bug described above?
Thank you!