You mean that khandha paribbanna and the consciousness of the living arahat is the same?
That is quite wrong. I cited the term samuccheda-marana (death as cutting off)and that is the ending of all consciousness. Unlike with the non-arahat there will be no patisandhi citta, no rebirth. The job is done. However the living arahat still has vinnana khandha.
I wonder if some of your ideas have come from sources like in this thread (apologies if there is no relation).

World Fellowship of Buddhists Magazine VolXIII no1 (BE2519/1976) From Nyanaponika Mahathera Forest Hermitage Kandy, Ceylon Commenting on the bio of A.Mun. "…the shock I felt when reading the statement in the 4th section (p.135) that “a number of Buddhas togther with their arahant disciples” had paid a visit to the Acharn to “offer their congratulations upon his achievement”. The controversy that understandably arises upon such a statement can I think be conclusively and decisively settled……
Also see here where venerable Subhuti explains the errors. The Dark Side of Ajahn Mun's Biography | American Monk: Life with Buddha, Dhamma and Saṅgha