That's very curious.
I have a couple in my tree who were divorced in 1950. Some years ago I was able to order and look at all the documents about this case in West Register House, before the West Search Room was closed. I put the case reference (CS258/26264) into the NRS catalogue search, and it returned no results. So that set of documents, at least, is not included in the catalague now, although it was then.
So I searched in the NRS catalogue for the term divorce from 1940 to 1950, which returned 37 results. Of the 37, most seemed to be more general, and did not name individuals.
So I searched for listings starting CS (Court of Session), which produced just 6 results, including the two in your screenshot. Using CS258 narrowed it down to 4 of the above 6, not including yours. See screenshots.
So I deduce that they have indeed removed from the online catalogue all references to divorces from 1940 to 1950 inclusive, except these 6 cases. Why these 6, I wonder? What is different about them?
Where exactly did your screenshot come from? Is it from a printed book? Does the rest of the page include any divorces in that period that are not listed in my screenshots?