Grafana 5.4.3 Query returned no data in PCF

We have used Prometheus for a while now. Recently however, we had an issue where a few of our alerts are responding with Query returned no data. We have restarted services and most alerts have been restored by there are 3 that still show this error message. I have reviewed multiple logs with little information on how to correct this. The alert itself returns a null value. Any help would be greatly appreciated.
message:“Condition: Eval: false, Query Returned No Series (reduced to null/no value)”

So the alert test rule says no data, but you see data in the graph for the same query?