I have several Library on AI Creative Cloud (shared with a colleague). There is a "Final" Library where we store the design that will be used to print on final products, and there is a WIP (work in progress) library that we use for the yet to be released.

In Final Library there might be an item call "1234a" and we would be working on "1234b" in the WIP library (1234b usually would be made as a duplicate from 1234a and then renamed and edited)

Then we would place the 1234b on our artboard arrange several other items etc.

Once we validated the design, I would to edit the "1234a" item with a big red cross to signify it would be outdated (In case this 1234a would be used in other files), and move it into an "archive" library and then I would move the "1234b" item from WIP to Final library.

This used to work fine until recent update of AI, but now when I do this "move to another library" all the 1234b that were present on the artboard while the 1234b was still in the WIP library would regress to 1234a... So i would need to relink all again! So that's a huge rework to do for all our files.

I describe a "simple" case where we update on item from a to b, and it would be obvious that we regressed to a as the big red cross to signify "outdated" would appear, but if I forget to have this discipline or for whatever reason we dont want to use this red cross, then AI would swap the element on the artboard with an old outdated one without any notice.
That is something I hope can be fixed.

This happened both on me using Mac OS Catalina, and my colleague on Windows 10, both of us updated to last AI 24.2.3