Your taskbar image is not the same issue as I had. Mine had gaps where apps were active, but no icons or readable text. My issue was that the active app was shown in white on a white background,...

The issue wasn't so much classic Shell itself, but that the Theme left me with a white taskbar and no way to change its color. At least classic Shell allows you to change the taskbar color out side...

I just had a similar issue right after installing Win10 over Win7. I went online with MSFT support and they uninstalled Classic Shell (which I had loaded to get as much of Win7 back as possible)...