Chart node: inconsistent display

Hello everyone,

since switching from a Raspi 3B+ with a Node Red version from 2017 to a Raspi 4B with Node Red version 4.0.3 (Node.js v20.17.0), I have noticed (at least with Safari on an iPad with the latest iPadOS and on an Android tablet) that when I open a page with chart nodes, they are displayed distorted or with an unfavorable font. I have not yet noticed this with other browsers (MS Edge, Chrome, Firefox) on a Windows PC.

Strangely enough, this usually only happens the first time I open the respective tab (after a longer period of time). If I switch to another tab and back again, the display is fine again. This problem did not exist with the old Node-Red.

Here are two screenshots to illustrate this:

Incorrect display:

Correct display (after switching back and forth):

Is there any way to influence this?

Two more hints:
All 4 charts have min and max values entered for the Y-axis. So in this case there is no automatic scaling. In addition, all 4 charts have a fixed size (4x4).

Thanks and greetings
Merleg

Which dashboard are you using, the original or Dashboard-2?
I'm assuming the original ...

Yes, I'm using the original Dashboard.