after updating to iOS15/iPadOS15, some model textures are missing. It seems more like a bug in Safari, but maybe some of you have an idea/solution/workaround.
For a quick look you can visit http://rundgang.stasihaft-dresden.de/?room=haftkeller, which jumps right into a room, where the problems gets instantly visible.
Here is a image which shows the difference in comparison:
Here you can find the model (only the room, no people):
If you download the model and and upload it to https://gltf-viewer.donmccurdy.com you can see the difference as well when running this on iOS 14/macOS and iOS15.
Thanks and cheers