Thanks very much for the suggestion. I had run the manufacturer's diagnostics and found no issues. I just tried what you suggested and no issues. Windows 10 and all the other software is fairly complex, so an occasional blue screen when exercising things makes sense. I am also at about 5300 ft above sea level, so it might be an occasional cosmic ray somewhere through the computer electronics.

Issue (4) still persists on one page on the website noted. The problem occurs when I anchor a non-variant-shared image to variant-shared text. That automatically shares the image to the variant. Normally this has worked just fine. In this case when I do this with another image, it groups that image and another on the shared mobile variant.

I checked, and I can share each image across variants and there are no problems. This may be a workaround. I've not tried then linking those images to text so they scroll as text is changed.