How do I fix awkward interface changes in Adobe Photoshop CC 2015.1 after the November 30, 2015 update?

Question

Adobe

Artboards made it easier to work in Photoshop (especially for mobile app design)
The latest update of Photoshop CC 2015 brought a lot of changes to the interface as well as to the workspace. This also affected the brand new Artboards.
If in the previous version each sheet (Artboard) was, as it were, separate from each other, now there is a substrate that interferes. In my example, it is transparent. I dug into the settings, I didn’t find how to remove it, maybe someone knows the answer to this question?
Screenshots in the application:
1) As it was in the previous version

2) As it is now with a

background 3) How it should be without a background (corrected by filling the background with the background color of the workspace)

Answer 1

Hm... dear community, this bug has been removed after several restarts.