More recent updates available

Has anyone noticed when looking at an errata update (e.g., https://access.redhat.com/errata/RHSA-2017:0931) and click on updated packages, you sometimes get the following message

 Note: More recent versions of these packages may be available. Click a package name for more details. 

That's nice, but the problem is that none of the links are clickable. Are they supposed to be? Is there an easy way to find out what the more recent updates are?