Searching child products by SKU doesn't work anymore

[kaiserdom]

Hello. Merry Christmas to everyone.
I wish Global Peace and love to every single human being.

In the latest version of Virtuemart (3.2.12), searching uncategorized child products on the frontend by SKU, has stopped working. I must emphasize that I have enabled the "Show uncategorized child products" on the backend. Please take a look.

Joomla 3.8.3
VM 3.2.12
PHP 7.0.26