I see anicca as the determining factor in all of this.
It will perhaps be helpful to see the main idea that an Arahant will therefore not attach, even less draw closer, any of the khandhas, vinnana being their summation. So “kamma viññāna created via the Akusala-Mula PS process do not arise in an Arahant”; and so we may continue..’ even via the kusala-Mula PS process’ ?