In the block and item tags for non_flammable_wood, decorative_blocks:warped_palisade is listed twice.
decorative_blocks:crimson_palisade and decorative_blocks:warped_beam are omitted.
https://github.com/lilypuree/Decorative-Blocks/blob/1.16/src/main/resources/data/minecraft/tags/blocks/non_flammable_wood.json
https://github.com/lilypuree/Decorative-Blocks/blob/1.16/src/main/resources/data/minecraft/tags/items/non_flammable_wood.json