App site association failing occasionally

Hello all - we have enabled our app users to create and sign in using their passkey. However - for some users, we get a NSLocalizedFailure reason exception that the app is not associated with the domain.

We have ensured that the endpoint /.well-known/apple-app-site-association isnt blocking any requests.

Like I said before, 90% of our users are able to successfully create and sign in with their passkey but we receive the above error for the remaining 10%.

Any suggestions/guidance on how we can resolve this would be helpful and greatly appreciated. Thank you.

App site association failing occasionally
 
 
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