Based on my experience, and the answer to this post, there seems to be a delay on the availability of device property tags such as ua_locale_language. Is this indeed true, and if so what is the reason for it?
We localize all our push notifications, and rely on device tags, specifically ua_locale_language and ua_locale_country to schedule localized payloads to the proper audiences.
We expect to be able to send push notifications to a user as soon as the app is installed, but with the delay that ends up not being the case.
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