The skull and signs render in front of the lightning strike but the skulls and sign are supposed to be behind the lightning.
MC-167752 Honey block is visible in lightning bolt
MC-168035 Water and clouds don't render correctly when viewed through lightning
MC-168648 When lightning strikes in front of water, the water is put in front of the lightning.
MC-44244 Lightning causes water, stained glass, entities, and tile entities to disappear
MC-161901 The middle part of lightning does not render in front of or behind water or portals