Twenty Seventeen theme not showing images on Mac Chrome

Just went live with a new WordPress install. It looks great using the standard Twenty Seventeen theme, but I’m having a problem with only certain browsers.

When I use Chrome on my Mac and on my wife’s Mac, the background/parallaxy images don’t all show up, instead it shows a gray gradient. When I choose “Inspect” on that area, it shows the correct url and background() code. Using Safari works as expected. Using Chrome on my PC works as expected.

The confounding factor is that it doesn’t always not work. I’m hoping I can get a few more people to look at it so I can get some more data points.

Any ideas? Thanks!

The page I need help with: [log in to see the link]