@Ondřej-Šutera
Interesting. It is an active pattern that moves, not being a static picture by appearance, the static pictures around the edges in the buttons (if they are that) looks ok, also other websites work well (except those doing tracking and profiling), I am not sure I get the explanation of the underlying reason, but that's all right, the result is the same regardless if I understund or not.

So basically fingerprinting protection is not supported by your web site.
Actually I need fingerprinting protection, that is an essential tool these days.

Thanks.

(I wonder where my previous response went from two or three days back btw...)

@Ondřej-Šutera
In Firefox (I use MacOS 12.6) go about:config and set privacy.fingerprintingProtection to true. The site will show this engineered view:

Turning off fingerprinting protection will restore the site to normal view.