Visible Unit Section on timeseries line chart not working
I've created a basic line chart with has time-series data on minute granularity.
I have turned on "Time-series", I have turned on the date slider and I have turned on "Visible Unit Selection"
My default chart granularity for my timestamp field is "minute".
The chart displays fine the first time I run the report minute granularity, however as soon as I click on a different unit (e.g. hour) then the chart goes to daily granularity for some reason and then never shows anything different ever again, e.g. if I click on the minute unit selection then it still shows it in daily.
Am I doing something wrong here?