If a point with a zero value is selected - then a wrong state is displayed

My weather station measures the amount of rain with a rain counter, which sums up the continuous amount of rain. For showing the daily rain, I’ve configured the following card:

type: custom:mini-graph-card
name: Daily Rain
entities:
  - entity: sensor.weather_station_rain_counter
show:
  graph: bar
hours_to_show: 168
aggregate_func: delta
group_by: date
hour24: true
line_color: '#15317E'
labels: true 

The result seems correct: 27.4 mm is the total amount so far.

When hovering over the particular days, the card shows the correct value unless on that day there was no rain. Than it shows the total amount. However, IMHO it should show “0”:

Is my configuration wrong, or is it a card issue?

Thanks!

[wizake]

I’m also having this issue with a bar chart 😦

[scharmach]

Not a solution, only a workaround:

color_thresholds:
  - value: 0
    color: '#1c1c1c'
  - value: 1
    color: '#a4958b'

• 0 = colour of the background
• ≥ 1 = colour of the bars