Variation title NULL adding a new Variation type

Hello

I have this issue.
When we add a product, we fill title, and new variation fields like price, status, image ... if we click on Save button, at bottom of page, instead on Create Variation, then variation title is not filled with title.

If you click on Create Variation before the Save button at bottom, the variation title is filled correctly.

If variation title is NULL, then we have problem on all views, because title is not displayed. Views like Shopping cart form or similar views.

I'm not sure if it's a bug or defect, because the problem appears when you don't click the create variation button, and click on Save directly. It could be a problem when a user could add products in the store.

I search on issues, but I'm not sure that problems reported was the same as this.

Any help will be highly appreciated. Thanks in advanced.