Here is a weird thing I started seeing about 2-3 months ago.
Registered an issue on Github. Wanted to share it here.
A standard history-graph for a frequently changing state:
The look has some graphical artefacts.
If zoomed in - these artefacts are less visible:
Same in Chrome, FF, MS Edge.
In Companion app (iOS 15.x) with a default scale - rendered much better, no artefacts.
Chrome in iOS - also OK.
Test with 2023.7.1 with a manually changed input_boolean - no artefacts:
Zoomed in:
So, smth in HA (or external Chart.js) made it worse.