There’s no perception of external senses in the arupa jhanas. Everyone agrees on that. I fail to see how you get a fast “flickering” or “static” from these descriptions.
It appears to me you’re assuming that any consciousness/phenomena at all must flicker, as a sort of Theravada Orthodoxy?
Thank you. This was a very informative talk. I learned some new stories to help explain “perception and non-perception” (i.e., the puddle is water and not-water to fill a jug).