Bukkit's PersistentDataContainer is loaded in `BlockEntity#load()`. For all tile entities up until 1.20 this has been fine as their overrides have invoked `super.load()`. This, however, is not the case for `BrushableBlockEntity`, `ChiseledBookShelfBlockEntity`, and `SculkCatalystBlockEntity`, none of which invoke super, causing Bukkit to not load any of its persistent data which results in loss of data for these blocks.