Try updating the app.

However be aware that the app runs offline and is not accurate and reliable enough to use on its own.

Websites of train operators such as https://www.bahn.com/en should be used to plan and check the up to date running of trains.

Best is-no need to even think about this-the site of the operator concerned-here TrenItalia.

15/8 is a national holiday in IT (its roman catholic-Maria, the mother of Jesus goes up in the sky/heaven) and hence there may be a different timetable in force-its also tipically ITalian to realise that only too late.

Thank you so much!