Many apps using sound crash after approx 15 minutes

Question

I have a 100% normal Samsung Galaxy A3 2015 (SM-A300FU) with Android 5.0.2. It is non rooted. I notice that every time I use an app using sound (this might be an effect, but not the cause):




  • WhatsApp phone call

  • Music Folder Player Full

  • a webradio app (that plays radio continuously)



the app crashes after ~ 15 minutes. It happens with no dialog box, it returns to desktop screen.



What could cause such a bug? How to solve this?


— Basj | Sources

Answer

@xavier_fakrat's useful answer provides many potential reasons that could have caused the crash. After more investigation, here is what caused the crashes: the Android app optimisation feature, that can be found in Settings > Battery > Optimisation.



The solution for me was to disable optimisation for Whatsapp and music player apps.



enter image description here


— Basj | Sources

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