Release of opinion announcements is an especially prickly issue with the justices. The announcements are summaries written by the justice who wrote the majority, and the other justices in the majority don’t sign off on the wording.
Current and former justices have said they are sometimes surprised to hear the announcement, which may overstate or oversimplify the holding in ways they don’t approve. As a result, some justices don’t want the opinion announcements to be featured in the news media as an accurate representation of court decisions.