Foreground service with PowerManager.PARTIAL_WAKE_LOCK going to sleep

[guymillicare]

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I try to create simple timer. According to documentation I have permission and use this code in the ForegroundService:

PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, getString( R.string.app_name ) );
wl.acquire();
It is working well for most devices when screen goes off, but some devices, for example Honor 10i (Android 10), after 10-15 seconds go to sleep mode and timer based on Handler is sleeping.

I tried set off battery optimization etc., but this is not help. What is wrong?

Note. If function in the Handler plays "tick" sound then it works fine.

[Doraemon730]

You should use REQUEST_IGNORE_BATTERY_OPTIMIZATIONS permission and ignore battery optimization for the app.