SingleStat not always displaying value

A bit of background.

I have an index in ES that the individual docs have a high update frequency and the Grafana dashboard is updating with 1 sec interval. The dashboard has about 20 SingleStat panels on it.

The behavior that I am seeing is that the SingleStats tied to the documents with a high updated frequency will sometimes not display information. When I go to the Query Inspector I am seeing it spinning through multiple urls for api/datasources.proxy/X/_msearch where X is 1-5. When the Query Inspector stops the spinning the value begins to display again.

Any direction on this would be greatly appreciated.

Thanks,
Rick

Just some additional information. I have tried using a server and browser ES connection. They are both showing the same behavior. The browser seems to get backed up on calls and takes a bit to get caught back up. This does not seem like an large number of metrics and am not sure what is causing this processing issue.

Thanks,
Rick