@eskimo  I also have the same problem on iOS 15 RC and Xcode 13 RC. I filed a bug report for FB9447186.

Thanks for your reply. Reading your bug report it seems that you’ve determined that there’s a threshold of 50 URL schemes. Is that right? Yes, that’s correct. I tested with a small sample project attached on the FB. The problem is that the behavior is different among iOS versions (iOS 15 and others) and I cannot find any documentations related to this. So I suspect this should be a bug on iOS 15.

Hi all, I’ve got another message on my FB, saying ‘This is an intentional change for privacy to reduce the ability of apps to determine what other apps are installed.’ And I also realized that the API documentation has been also updated related to this topic in Important note. ’Apps linked on or after iOS 15 are limited to a maximum of 50 entries in the LSApplicationQueriesSchemes key. ‘