This has happened to me twice now within 2 days.
Once when loading a saved (to local HD) place, and then again today when opening an empty workspace.
When I click the ‘Insert Part’ button on the Ribbon
The whole texture on my baseplate will flicker incredibly fast between normal, and the image below for about 1 second.
The new inserted part disappears and
then the scene looks like the image below.
If I then click on any part, everything goes back to normal, with no flickering.
I did not get a screenshot of the first time I saw this happen, however I should note, instead of the texture going black, as in the example I posted here, instead it was replaced with a color map texture for a set of meshes I have in that project.
So it seems visually at least, that something is causing the wrong texture to be displayed.
Also there were no errors or anything. It just seems to be purely visual as far as I can tell. It is rather unsettling, when you click to insert a part, and the whole world is flashing and goes dark.