Syncfusion Calendar is not showing the first time interval

I'm using the syncfusion_flutter_calendar, and on the Day view I'm showing a time range 7am - 5pm. My problem is that the first time (7:00AM) is not showing, instead what I see is 7:30AM.

Here is my code:

SfCalendar(  //dataSource: MeetingDataSource(_getDataSource()),  allowedViews: const [CalendarView.day],  timeSlotViewSettings: const TimeSlotViewSettings(    startHour: 7.0,    endHour: 17.0,    timeInterval: Duration(minutes: 30),    timeFormat: 'h:mm a',  ),)

I've tried to reduce the startHour by 30 minutes, but the visual is not exactly what I want (there is one extra row on top), in addition users can create appointments starting at 6:30AM.

Any help how to show the first time, will be appreciated.