When you highlight a link in the document, it used to highlight the corresponding image in the links panel, so you could easily edit or replace, instead of having to scroll through the links panel trying to identify the asset from the thumbnail. A minor workflow thing but it makes a difference. Would love to have this feature back in.
Tim Reid shared this idea
This issue is still happening intermittently. Please fix it
Hi Tim, I ran into the same problem but luckily in my case a simple restart of Indesign did the job.
However if the problem is more persistent, try this link: https://indesignsecrets.com/topic/links-panel-not-highlighting-in-cc