Android alarm doesn't go off

[AC Question]

Hello guys ! So basically, I have a lot of alarms set on my android (around 5) repeated everyday, and sometimes one of them doesn't go off(especially the one at 5 o'clock at the morning).

I don't get any notification about my alarm getting silenced or anything, I've tried restarting my phone at least once a day.

I'm using ultra-battery mode from time to time to charge my phone on my huawei p8 lite, and turning my phone to aeroplane mode to not get woken up by any social notifications ,Can any of them cause this issue ? If not, what else can make my alarm mal-functioning ?

 

[Tim1954]

Why not just put it on silent mode making sure your alarms still go off?