No Data shows in Time range

Hi All,

When i select the time range as Last 7 days in top , it is not providing data.Shows as No data in the graph. If select a date range past 7 days it shows the data.

Below show no data if I select last 7 days.

Time range selected with date past 8 days before it show data.

Please help to advice to show data when i select time range as Last 7 days or 10 days.