You have data sync turned off in system settings. Notifications may not arrive when app is closed.
Data sync may be implicitly turned off by the battery optimization mode on your device.
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您於系統設定中關閉了數據同步。當程式關閉時，通知可能無法到達。
裝置上的電池優化模式可能會自行關閉數據同步。
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Tony Wong,
Mar 16, 2019 at 20:59