Search a route, say tram 4, and enter the route page. Click one of the vehicle marker icons on the left side of the stop list. This is supposed to change the view to show a single departure: the map focuses on it and other icons turn grey. However, something strange happens. Sometimes a new pattern becomes selected. Sometimes all icons disappear. Sometimes the UI freezes, and shows spinner forever.
Note: this functionality works fine when applied by clicking a vehicle icon on the map and selecting 'Lähdön tiedot' from the opened popup.