Xcode show changes in GitHub PR leads to endless spinner

I created a new Project on Xcode 16 on macOS Sequoia and connected it to a GitHub repository. After making a change on a sub branch, I opened a pull request. On GitHub I can see the changes I made in a diff view. However when I select the PR in Xcode and click on "View Changes" all I get is a endless spinning activity indicator. I could not find anything that would explain this behavior.

Any help very welcome.

I made the relevant GitHub project public. You can find it here: https://github.com/marcoconnor-radio/GitHub-vs-Xcode

Xcode show changes in GitHub PR leads to endless spinner
 
 
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