Why do some app alert sounds not work on iPhone 6?

[iMore Question]

why do some app alert sounds not work on iPhone 6?

I have an iPhone 6 with the most current iOS installed. I've tried everything...

**deleted and reinstalled apps
**made sure sound notifications is enabled
**did a soft reset (hold down the 2 buttons until Apple icon appears)
**I "reset all settings"

But...so many app alerts will come with the banner but no sound. Sometimes the sound will word and sometimes not at all. Some app alerts used to always work but now never.

Just very frustrating. I feel like I've tried everything but no solution. I keep on thinking that somewhere, somehow I inadvertently put some apps on "mute" or turned off the volume? Any help would greatly be appreciated!

Thanks in advance...

 

[TurboTiger]

Re: why do some app alert sounds not work on iPhone 6?

I have several apps whose alerts / notifications have never made a sound.
It's been like that from the very beginning.
Good Luck