Does this work in sandbox environment? I think I got everything setup based on the doc but on sandbox I cannot silent the notification. I do have the push type header set but on console I still see the should present = 1 fault 13:19:44.299587-0700 SpringBoard Got effective section info [ result: 0 ] default 13:19:44.299715-0700 SpringBoard [com.globalrelay.gr-app-im] Got effective section info [ hasResult: 1 ] default 13:19:44.299810-0700 SpringBoard Getting effectiveSectionInfo for section identifier: com.globalrelay.gr-app-im default 13:19:44.299882-0700 SpringBoard [com.globalrelay.gr-app-im] Getting effective section info default 13:19:44.299942-0700 SpringBoard Getting requested effective section info (sync) default 13:19:44.301367-0700 SpringBoard Got effective section info [ result: 0 ] default 13:19:44.301501-0700 SpringBoard [com.globalrelay.gr-app-im] Got effective section info [ hasResult: 1 ] default 13:19:44.301567-0700 SpringBoard [Persisting notification CA60-3031: 1 [applicableSettings: 1] default 13:19:44.301626-0700 SpringBoard [com.globalrelay.gr-app-im] Saving notification CA60-3031: 1 [ hasAlertContent: 1, shouldPresentAlert: 1 ]

I read thru the open source Signal Messenger code, they only have the filtering entitlement for App Store, so I am wondering if this only works for App Store (production push)?

I am in the same situation, I can confirm the type is set to alert but still unable to filter the notification Received remote notification request 8B7E-2E97 [ waking: 0, hasAlertContent: 1, hasSound: 0 hasBadge: 0 hasContentAvailable: 0 hasMutableContent: 1 pushType: Alert] After my extension returns an empty UNNotificationContent, I see this in console: Mutated notification request will not visibly alert the user, will deliver original content; notificationRequest=8B7E-2E97, runtime: 9.882166 Then it delivered the visible notification: Saving notification 8B7E-2E97: 1 [ hasAlertContent: 1, shouldPresentAlert: 1 ] Delivered user visible push notification 8B7E-2E97