AlarmManager not working in several devices

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I’m trying to solve it several weeks already. I found nothing. Huawei just kill all the alarms after some time. If I put the app to the protected app in their battery saver it does’t help. But If I change package name of my app to contain words like alarm, clock or calendar, it works absolutely normal like on any other devices. I don’t understand how Google can give certification for this crap. I think that OEM should not modify core platform in such way. I understand that they have own batter saver which kill the app after some time, when user don’t use it. But this killing alarms also of protected apps.

Also setAlarmClock() for exact timing alarms helps. But it is not possible to use this for thinks like widget update.

Update: Protection by package name keywords is already not working on current Huawei devices, it was true in 2017.

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