Single stat Math Panel doesnt refresh automatically

The Single Stat Math panel does’nt seem to refresh automatically when time range is beyond 2 days. When I edit the panel and click on query explorer it refreshes and shows correct data.

You can see from screenshots below that the count changes on the panel after I click on query explorer. Again if I refresh dashboard the numbers shown are smaller and incorrect and requires me to edit panel and click query exporter post which correct values come back.

min_over_time(wmi_service_state{job=“wmiserver”,state=“running”,name=~“ctmag”}[20m] ) == 1


Grafana version- 6.7
Prometheus - 2.17.1
Singlestat-Math: black-mirror-1-singlestat-math-v1.1.6-12-g0aca146