Thanks but again this seems to be somewhat related but not identical to the illusion described in the article.
(Sure, the illustration / GIF / captioning on the OP aricticle is really poor and confusing)
But the illusion described in the article involves three actual flashes (without beeps) and the illusion is aboutthe LOCATION of the second flash, not that the second flash itself is a phantom / non-existent / imagined one.
