I am having a similar bug on BQ Aquaris E4.5, ringer is not broken but sound notification for Messaging sometimes stops working, LED blinks on new SMS and it vibrates but no sound is heard, to resolve this I need to reboot the phone. It happens randomly, like something breaks sound notifications for Messaging, ringer works, Telegram works, and Music works but no sound from Messaging.
I am having a similar bug on BQ Aquaris E4.5, ringer is not broken but sound notification for Messaging sometimes stops working, LED blinks on new SMS and it vibrates but no sound is heard, to resolve this I need to reboot the phone. It happens randomly, like something breaks sound notifications for Messaging, ringer works, Telegram works, and Music works but no sound from Messaging.