I doubt everyone saw a previous link embedded in one of the threads, so I've provided it below. An excerpt:
"Public Dungeon & Delve Boss Monsters – Also based on feedback, we will be placing a timer on how often you can get loot from public dungeon and delve boss monsters. This timer is shared across all boss monsters in public dungeons and delves. This will not impact loot timers for quest-specific monsters or overworld group bosses. Watch the patch notes for news on when this change will go live."
forums.elderscrollsonline.com/discussion/78524/upcoming-patch-highlights-in-progress-updates#latest