Real-time Dashboard didn't display data (using REST API)

Hi,

I created a Real-time Dashboard using REST API. I created a real-time dataset and added a tile with "Real-time Data" in Dashboard, but my tile didn't display any data. 

Real-time tile

 I tested data and it is still rendered in a normal tile (pined from a report)

tile is pinned from report

 Do you have any suggestion in this issue ? May something I missed here ?

Thanks in advanced,