Notifications randomly very loud

I have the same issue and it's not a question of settings or the phone working the way it's intended. It's a bug or something NOT functioning correctly.

It happens to me all the time so I went into settings and turned OFF the option to "Change with Buttons". I dragged the Ringer and Alerts slider to the lowest setting with just the tiniest bit of volume. It still happens. So regardless of whether the alert volume is tied to the volume button, some sounds and alerts are randomly crazy loud.

More than half the time the alerts seem to abide by my chosen setting, but they go absolutely rogue at least a couple times a day and for different apps.

Just now I had an ear-splitting alert from the Ring app notifications and I double-checked all the settings. Alert volume is at minimum, there was nothing special about the notification, etc...

This also affects any app that uses sound effects such as Calcbot. I turned off the sounds eventually in the app settings, but I did like them to be on at a minimal volume. Sadly, very often they would switch to "ear-splitting" so I turned them off in the app.

I don't have a ton of apps that send notifications, so I can't provide a lot of context for when this happens. Mostly it's the Ring app that sends notifications, so that's where I notice it going rogue the most.

1. Tap the "Settings" app in the iPhone home screen.
2. Tap "Sounds" in the settings menu.
3. Scroll to the "Ringer and Alerts" section, which covers the ringer and message alert sounds.
4. Drag the volume slider to the right to raise the volume. Drag it to the left to lower the volume.