Hi!

In August I'm going to make my second interrail journey, and this year I've purchased a first class pass. Now I've started with making some reservations, if they are available. In the ÖBB app, first class reservations were for free on some trains, while second class reservations had a €3 fee. How come first class is free actually?

Those free reservations were for the Raljet 67 Wien-Budapest and IC 210 Zagreb-Ljubljana. I have the reservations as PDF ticket.