Missing building materials marked as “owned”

I posted earlier on Reddit about missing some building materials marked as owned from a festival:  the herringbone masonry floor during enchanting autumn, the stand-alone straw/ thatched roof from Nalani’s beach house, and now it seems the Behr container walls. I do not have any of these building textures/surfaces—they’re only available in the house templates, not independently, and I can’t choose them as an option on any build without using that template—and I don’t have a bunch of spare templates hanging around. Have people here had the same issue, and if so for how long? Did anyone have luck with support? How can this be fixed?