We recently experienced a similar problem (and resolved) that began manifesting itself after adding several more dashboards/reports/datasets. At PowerBI desktop, all works well. Publish to web and all looks well at app.powerbi.com. Next day after scheduled dataset refresh accessing the dashboards at app.powerbi.com briefly showed the dashboard and then it disappeared. We solved the issue by increasing the DTUs (database transaction units) for the Azure DB we were querying. Effectively, we enhanced the performance of our queries and all began working as expected. I believe the following is what was happening. The scheduled PowerBI dataset was failing but any error was 'eaten' and PowerBI was reporting a successful dataset refresh. I believe the brief flash of the dashboard you are seeing is a cached version. PowerBI correctly chooses NOT to show old data (expecting to show data after a successful refresh) and thus you see what looks like the display disappearing. Over all of this PowerBI desktop did not run into any query problems and thus all appeared well.