Hi,
that's nothing new and not related to Windows 7 or any other specific system!
What you see is the buggy 'css3d software rendering' of Chrome.
It's there since the very first Chrome versions that were supported css3d.
It gets used when Chrome can't or doesn't want to use the graphics hardware for rendering css3d.
And that can happen on all systems - Windows, Mac and Android.
It might be that the latest Chrome update is blacklisting your GPU now and so Chrome is no longer using your graphics hardware for rendering.
The Chrome bug was reported already a several times for many years, but Google unfortunately don't want (or can't?) fix it, I don't know why...
Here some related Chrome bug reports - please post your opinions about that bug there:
https://bugs.chromium.org/p/skia/issues/detail?id=3697
https://bugs.chromium.org/p/chromium/issues/detail?id=224618
Best regards,
Klaus