graph in more-info: weird accuracy

[ildar170975]

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

This is a test dev setup with Demo integration installed.
A weird accuracy is shown:

I did not (& probably could not) change a value of this sensor (and did not touch accuracy settings).
Probably it is caused that this is a dev setup?

There was a similar issue: #18982
I closed it since did not observe it after Echarts.

The entity is "LTS-able":

So the graph is supposed to be a statistics graph with 5-minute readings.

Describe the behavior you expected

A value with original accuracy is shown.

Steps to reproduce the issue

as above

What version of Home Assistant Core has the issue?

HA 2025.5.0.dev0, Frontend 20250326.0

What was the last working version of Home Assistant Core?

No response

In which browser are you experiencing the issue?

No response

Which operating system are you using to run this browser?

No response

State of relevant entities

Problem-relevant frontend configuration

Javascript errors shown in your browser console/inspector

Additional information

No response

[ildar170975]

Another probably related case:
same setup, same Demo integration - but for Humidity: