Progressive Chart Rendering
When reloading a chart, show the last successful refresh of the chart (if available) until all the data has been refreshed and displayed.
When the rendering option is enabled, a version of the chart is cached (for an hour) and then displayed while the data is being retrieved and refreshed. If you try to interact with the cached chart, you will see the loading icon.
Set the Enable Progressive Chart Rendering toggle ON.
(Save) the changes; select OK to refresh the page.