// public static final Block STRIPPED_DARK_OAK_WOOD = register("stripped_dark_oak_wood", new RotatedPillarBlock(BlockBehaviour.Properties.of(Material.WOOD, MaterialColor.COLOR_BROWN).strength(2.0F).sound(SoundType.WOOD)));
   public static final Block STRIPPED_MANGROVE_WOOD = register("stripped_mangrove_wood", log(MaterialColor.COLOR_RED, MaterialColor.COLOR_RED));

While pulled from forge (for modding)  Unless forge completely messed up (possible)  The STRIPPED_WOOD for mangrove is using the log() method, while the Normal one uses 'new rotatedpill...'  

It's stands out as the only WOOD variant to use the log() method.  I have a tendency to think this is in MC itself, as forge tends to effect only 1 of a group of things that should be treated the same.

Frankly I don't know where this issue comes from (forge or Mojang)... so reported to both.