Hello tdegeus
I checked the case and can confirm, IC1 train 719 did not have a business zone on 30.05.2024.
There are two versions of the Bombardier Twindexx trains: an IC version, and an IR version. They look almost identical yet the IR version offers less services, in favour of a higher seat capacity.
On 30.05.24, an IR version replaced the originally planned train. This led to the inconvenience that no restaurant car and no business zone was available.
From what I know, the itinerary details is not updated when it comes to short-term changes on the carriage; the train composition details are, however. So is the information panel on the platforms.
I have to check with SBB why the trip details are not reflecting the services actually offered. I must admit, as you said, it is contradictory.
I will be back with more details, if available.
Kind regards,
Roland