And quick way to reproduce this (I hope this is the same) bug:
clear cache and data in safari settings
send push and wait
see nothing
open the pwa
see your notification
whytryharder
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Post
Replies
Boosts
Views
Activity
Have the same issue, this is work for few weeks and then stop working. Very expensive bug for me.