iPhone message tone notifications inconsistent

I know this might sound obvious, but I just noticed that there’s a “hide alerts” feature in messages that appears if you swipe right on the conversation. I was wondering why texts from my wife didn’t have a tone play...I think this may be why. Later I noticed that a crescent moon appears to next to the conversation when “hide alerts” is enabled. See photo.

One thing I have noticed is that my iPhone 7, after upgrading to iOS 11, and iOS 11.0.1, will receive and properly display notifications if the screen is unlocks, but it will not if the screen is locked. The screen stays off, not notification sounds, nothing to indicate that an alert has arrived. I have also noticed that if my phone has bluetooth turned off (in settings) then it does display notifications properly when the phone is locked. I'm not sure why bluetooth is preventing lock screen notifications from working properly, but that seems to be the case for me.

My problem with message tones is this: when a new conversation is started I get a notification tone, but for subsequent messages the tone reverts to a kind of Swoosh in reverse, not audible unless you're looking out for it. If I make any changes in the course of the conversation such as choosing a new tone, the next incoming message sounds it correctly, then subsequent messages lose that tone again. I have checked Messages, Notifications and Sounds settings, have restarted and hard reset, and re-installed iOS11. Any ideas?

I'm having the same issues with my Iphone 8 Plus. When the screen is locked my phone doesn't vibrate or make a sound when I get an e-mail or text message. I think it has something to do with IOS 11. I reset my phone numerous times. It will work for awhile and then stop working. It's very frustrating.

Does anyone know how to fix this issue yet? When my screen is locked I get no notification that I have a text message. I only know when I open my phone and see the badge app icon. All notification settings correct, this has only started happening since the ios 11 update.

An update: bluetooth was the culprit in my case. Apple's fakakta decision to only disconnect bluetooth and wifi from the control center, not disable them, muddied the waters. Going into Settings and truly turning off bluetooth got my audio text notifications back 100%. I stream music daily via bluetooth so this is a pain to implement.

Bluetooth seems to be the culprit here as correctly isolate by a few contributors. Switching OFF BT (from settings and not from control panel) restores sounds/notifications for messages/whatsapp etc and switching BT back on disables the sounds.

Use Do Not Disturb on your iPhone, iPad, and iPod touch

A successful fix:

I had tried all fixes here, No help. Then I tried

Context:

• iPhone 6S
• iOS 11.4.1
• No watch
• I have Do Not Disturb set to run on schedule (10pm-8am, all above experiments done around 3pm)
• I frequently use Bluetooth headphones, usually turn off BT at Settings.
• I occasionally use Personal Hotspot

(Edited: correct path to setting I diddled, Settings: Notifications: Reminders: Alert Sounds.)

I am having the same issue with iOS 11 on my 6S. no notifications on lock screen, all settings are correct and I have just done a full restore. Frustrating. I am on AT&T, not sure if it a carrier issue with iOS or not, but figured I'd mention since I also restored network setting too, hoping that might help.

Middle of the night, finally realised what is happening: you don't get a message tone if the conversation is open. Close the conversation so that you only see the headers, and the tone sounds just fine. On the iPad that means having a New Message open so that existing conversations aren't visible. I can go to bed now.

Did the restore, it didn't fix the problem. My phone is still inconsistently sounding text notifications with: bluetooth off or on, for imessage and SMS, using default and custom tones. It's definitely ios11-related.

I was also frustrated by this problem. The suggestion regarding the special feature in IOS 11 to HIDE ALERTS for a single conversation was the answer. Swipe left on the conversation just like DELETING and you will see a new second feature. it will say either Hide or Show Alerts. If it says SHOW you have inadvertently done a HIDE before. I'm not sure how it happened because the person that it happened for was someone I would never try to DELETE, and this is the first I have heard of this feature. Sort of a Do Not Disturb for a single contact.

I suspected Bluetooth is the culprit and when I have a device connected. It affects text and phone notifications. Notifications are coming through the device but not the phone. Which means if I take my headset off I am effectively on DND.

Come on!! Was this a new “ feature“??

Sometimes I want to take off the headset without disconnecting.

For me, I had a set oh Bluetooth earbuds that stayed, “connected” even though they where no longer in use or anywhere near the phone. I noticed headphone icon upper right had corner of screen.

Resolved my issue