We would like to inform you that an issue was reported on the afternoon of August 23, where mobile users in the US region were unable to receive push notifications for community channel posts and other announcements. Our team promptly investigated the matter and successfully resolved the issue on August 25 at 5:00 AM.
Push notifications should now be functioning as expected. We apologize for any disruption this may have caused and appreciate your patience while we worked to fix the problem.