Althoug Ireland is in the EU, it’s not in Schengen, so visitors from other EU states still have to pass through passport control. The ban only applies to the open-border Schengen states (so includes the non-EU Norway and Switzerland).
So you have to go through passport controls to travel from, say, Italy to Ireland, even though they are both in the EU?
And thanks.
Here’s a source that says if you have an EU passport you have to show it, but it doesn’t get stamped, when traveling between Schengen and Ireland. If that is true, my scenario would still hold.