The other half of the story, shown on purpose. This material carries only its WGSL half, so the dissolve runs on the left and the right draws through the built-in shader: same object, same tint and lighting, no effect, and one line in the console naming the material.
Drawing nothing would leave a hole with no clue; refusing to start would let one shader take the whole game down. Degrading is the least bad of the three. Reach for it knowingly: if the effect matters on a phone, give it a GLSL half or compose it as a graph.