group_by: date not working as expected

I am using following definition

- type: custom:mini-graph-card
  entities:
    - entity: sensor.socket_dishwasher_energy_today
  name: Dishwasher
  aggregate_func: max
  group_by: date
  hours_to_show: 168
  show:
    graph: bar

So I expect that for each day maximum value calculated and single bar for this day will be present on the graph. Instead, I see the following: What am I doing wrong?

[maxwroc]

I don’t have time to look in the code now but i suspect where the problem might be located…

There is this place where we set the result array length. It is little bit odd anyway. And I think that what happens here is that there is not enough data to cover 7 days, we put the available data on the beginning of the array and then extend it to 7 items. The result is that first bars show correct values and the rest just repeat the last value. This is corner case which I haven’t tested. To be honest I don’t know then how come it works for line graphs 😃 as the logic is the same. If you have time before weekend you can try to fix it if not I’ll do it on Fri/Sat

[stepanov1975]

No, the second one from InfluxDB but the data should be same And the line graph looks right