When i go into/create a new world that i bought on marketplace before the release of 1.16, the inventory does not show any content from 1.16. When i light soul sand on fire, i get this icon. I noticed this after the bees/honey update that marketplace content purchased before the update did not have bees or honey content in the inventory after the update was released. However the nether update is so big that i expected to be able to use the new content in marketplace worlds i had been working on before! This has never been an issue until bees/honey as new updates always applied to every existing world.