A couple of posts with more information on the above issues:
“Anidassana, Appaṭigha Rupa Due to Anidassana Viññāṇa”
“Contact Between Āyatana Leads to Vipāka Viññāna”
– Note: The difference between indriya and ayatana is not always specified. One needs to understand whether it is indriya or ayatana depending on the context.