Data shows different after refreshing or re-open broswer

[cuibolun]

Hi, 

When I publish a report and open it to pbi service, it shows exactly the same result, however, if I refresh the page or after close-reopen the browser, it shows negative value. Any reason why?
This is the orginal view:

After refreshed the browser: 

Thank you!

[lbendlin · Accepted solution]

If you publish into a dataset that has a scheduled refresh setup then the Power BI Service will run another refresh. This refresh may cause your data in the service to differ from the data in the desktop.