Vertical axis of graphs doesn't start at zero

[erikgeurts]

Checklist

• I have updated to the latest available Home Assistant version.
• I have cleared the cache of my browser.
• I have tried a different browser to see if it is related to my browser.
• I have tried reproducing the issue in safe mode to rule out problems with unsupported custom resources.

Describe the issue you are experiencing

After the recent changes to graph cards, I've noticed that in several cases the vertical axis doesn't start at zero.

Here is an example:

Notice the vertical axis starts at 5, instead of 0.

Describe the behavior you expected

I expect the vertical axis to always start at zero in relevant cases.

Steps to reproduce the issue

...

What version of Home Assistant Core has the issue?

core-2025.3.4

What was the last working version of Home Assistant Core?

core-2025.1.x?

In which browser are you experiencing the issue?

All browsers, also in Android companion app

Which operating system are you using to run this browser?

Windows 10, Android 15

State of relevant entities

n/a

Problem-relevant frontend configuration

- chart_type: bar
    period: month
    days_to_show: 450
    type: statistics-graph
    entities:
      - sensor.grid_water_total_consumed
    stat_types:
      - change
    title: Watergebruik afgelopen 15 maanden
    hide_legend: true

Javascript errors shown in your browser console/inspector

n/a

Additional information

I'm reporting this in Frontend, but if this should have been in Core, just let me know and I'll post it there and cross-reference.