No notification on passbook update

Question

The project I work on is using a website and a PWA and not native apps. Because of this, I turned to Apple Wallet to notify my users with push notifications.

I used this page from Apple documentation to help me create passes and register them for updates and push notifications.

To notify a user, the key 'change_message' has to be present in at least one of the fields of the updated Passbook

The problem I have is that event though the passbook is getting updated, notifications don't always appear. (Most of the time they don't)

They do definitly work in some cases, but I can't tell why. For instance, when I turn my phone off then turn it back on, I do receive notifications.

After a couple of hours, I go back to getting updates but no notifications.

Has someone encountered a similar problem ?

Thanks a lot

Answer 1

Something similar happens to me, and after check iPhone logs with this command in linux:

idevicesyslog | grep PassKitCore

or use log unfiltered

idevicesyslog

Found a message about threshold limits inside device... The problem is this threshold is not documented or anybody talking about that but the message log is very explicit about this limit.