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Apple Wallet pass registration sometimes doesn't trigger

Hello, we re developing a loyalty platform for end users and as such emit Apple wallet store cards. Problem we're facing is that the HTTP POST /v1/devices/:deviceLibraryIdentifier/registrations/:passTypeIdentifier/:serialNumber in some cases doesn't come through and we have no idea why.

This only happens to a small percentage of customers, others work just fine.

Does anyone have an idea why this might happen? I believe our setup is correct when 90% of customers work and we receive these HTTP requests to our server.

Users can turn off notifications for Wallet, and may choose to turn off updates for passes. You should not necessarily assume 100% of devices will register at all times.

Apple Wallet pass registration sometimes doesn't trigger
 
 
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