I could be wrong, but this looks like it could be a cock-up at production level. I've seen it happen before, where a designer puts a representation of an effect in the visual, intending that the mocked-up effect be replaced later in the production process with the real thing, but due to close deadlines, bad quality control, and miscommunication, the mock-up gets printed; in this case without the cutout that should have gone where the effect is.
Though it could have been the case that the printer didn't have the specialised equipment necessary to cut the Braille, and no-one thought to check until the leaflet was ready to go. Still, bad QC and bad oversight by the client. But, as I understand it, about par for the course for the CPC.