i have found tons of natural generated frostmint over soda bottles that generate underground and ginger bread bridges

here is another example: forstmint generating over a gingerbread bridge,
maybe the ceiling_frostmint feature detects when purple soda is under but dont detect the blocks that are above it,it could be fix by adding a way to detect blocks like cake layers and chocolate (except sugar glass because the purple soda on the bottles has this glass), if a purple soda bottle generates underground, it should detect blocks above and see if the feature generates,

This is just a idea of how to fix it