I'm also seeing this in Xcode 13.0 final release.

It would be great to have some docs (any docs!) here. Specifically: What's the invalidation policy on the CDN cache? What's the iOS device refresh policy? It seems like it's only on app update or install, but if there's periodic refresh, we'd like to know about it. Detailed docs on the association file format. The WWDC video that mentions substitution variables doesn't really cut it. What's the user agent value for the CDN when it fetches the file? Can we make variants based on iOS version or app version? Based on the lack of response to my prior bugs, I will not be filing an issue with Feedback Assistant.