Hi Yuri.
I used Verge3D 3.9.0 to export a new .gltf file of the working model, and then used the App Manager to update the project. I uploaded it to the server, and it appears correct in Safari.
Once again, the model/scene is built essentially identical to the model that I am having problems with. So, even though this model is working, it’s not leading me to a solution for the one that is not working.
Again, thank you for your assistance.