When you click the Lore tab on collectibles the corresponding zone is supposed to pop-up so you can see which ones you already have and which are missing. I noticed that all the CoV collectibles I checked do not open this window up. So I guess it's the Lore Tab that's dysfunctional ??? You have to manually open through EQ tabs to see.
And some sets still state Sleeper's Tomb despite being found in Cobalt Scar. Here's to hoping this is part of next month's update!