This is something I have long harped on; it is my major complaint against Logos. I can't find the original thread I started on it, but the problem keeps coming up again and again and again.
Logos Research Edition books are supposed to have complete hyperlinks to titles already in Logos' catalogue. Frequently this is not the case. I would describe the quality of links in any given resource as "hit or miss," and you never know what you are getting until you purchase it.
Today I just received the title, Trinitarian Dogmatics, published in 2022, a Logos Research Edition. Very new book! I pleased to see that it references one of my new favorite theologians, K. Sonderegger, and her Systematic Theology, which I have in Logos. I was disappointed but unsurprised that the citation was not linked:

(This is from page 8.)
Over the years, whenever I have voiced this complaint, I have been given many excuses as to why linking everything in Logos isn't possible. I do not see why any of those reasons should apply here. The new resource is new, produced in 2022, not in the wild days of loose standards in, say, the Libronix era. The cited work is in Logos catalogue and predates the new one (2020). Don't say it's because the page number is Roman; I was able to enter that in the resource's go box and go right to the page. This is a Research Edition, not a Readers' ebook.
Checking further, the book makes about 8 references to Sonderegger. NONE OF THEM ARE LINKED. Checking even further, almost nothing is linked--not even Charles Hodges's ST which has been in Logos forever! You got Barth's CD, but not his more recently released Romans.
This is sloppy. Very very sloppy.
Faithlife, what do you have to say for yourself?