Chapter 4 - Dice textures not correct on first run

📚 Official Books ARKit by Tutorials
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Whenever I first install the AR Poker dice app for the first time, the textures are not correct. If I then run the app a second time, the textures are working properly. Any thoughts? You can see a video of the issue here:
https://chucktaylor.dev/public_discussion/videos/arkitIssue.mp4

I have tried the app on multiple devices, and I get the same behavior.
Xcode 11.5
macOS 10.5.5

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@chrislanguage Can you please help with this when you get a chance? Thank you - much appreciated! :]