I am using a resource pack that adds snowy textures below snow blocks and patches (https://www.curseforge.com/minecraft/texture-packs/snowier-snow/files). When used alongside this mod, all patch blocks produce the same effect: snow appears beneath them despite them not actually being snow. There is a screenshot below. This issue is likely caused by all the patch blocks being treated as Material.SNOW. I am not sure if there is a way to change this without causing further issues, but I am alerting you nonetheless.