I had to google that.
But that parsing of things is so advanced and non simple, that all sorts of disturbances can happen. On the other hand, our capability is also so immensly large, that most of those variances make no difference in every day life. Only, every day life became quite complicated.
Our brain is also master in lying to itself and ignoring things. And to invent things. Seeing connections in unrelated things and creating a conspiracy theory out of it, seems quite normal compared to that.
Noteable would be the thing with counting basketball players and not seeing a gorilla walk past the screen. Or how they managed to induce a fake memory about a childhood event in some participants - they would just invent the details themselves. Much of the supernatural people claim to have experienced can be sufficiently explained by this. You need not be sick to see ghosts in shadows. That is just your brain doing it's thing.
But that thing is also what let's us appreciate art. See a mustache wearing plumber in a red suit, instead of a bunch of pixels.