Does anyone know, if motifs from respective dungeon (ie Castle Thorn) or stone husk fragments from Labyrinthian or furnishing patterns from event zones content (ie Harrowstorms) are included as double loot during the Dark Heart of Skyrim event or will they still only drop one at a time?

I've read the info at https://www.elderscrollsonline.com/en-us/news/post/63149 but it only mentions there being a chance for motifs to drop in boxes that you can get from doing certain content not if there is double loot for motifs, fragments, patterns etc that normally only drop one at a time.

Thanks
Damian.