Grafana zoom level

I am using garfana 5.4.3 on top of influxdb data source. I populate the influx every 1 second. When I zoom in the graph the max resolution I get is 5 seconds. The Group By I have is ‘time($__interval)’ and I thought this is good enough in order to get 1 sec resolution.
Any idea?

thanks

Avishay

Please ignore. It was my bug. Sorry.