Basically there are four icons that rotate around 360° as they load similar to the “Card Flip Interaction” shown here on Webflow’s own 3D Transform demo page, in example 3 http://3d-transforms.webflow.com/ . The icons are comprised of an image and a flipcard back div. These work fine in Chrome and Firefox, but in Safari the images stay behind the back div until the rotation stops and then they “pop” in front.
Okay - well, I basically ended up rebuilding this animation to diagnose what was going on…
Looks like I was using an image for the front of the flipcard element and ended up putting that in a div with a background fill to match the shape or the flipcard back element. Also, It seems that I may have not been hiding backfaces properly. So, it’s a little different than what I started with but it works for now.