Currently ALL newer flagship models are affected by delayed notification issue for at least past 6+ months, which started happening after around may 2018. Most devices are affected such as: S7, S8, S9, Note 9 and similar.
This is related to "doze" feature of android phone, where samsung optimization whitelist options are not working correctly thus affecting almost all samsung phones.
The issue is reproduced during following scenario:
1. User locks phone, waits around 5m
2. App sends notification (which is not marked as PRIORITY in google push services).
3. User does not get notification
4. User unlocks phone, and suddenly multiple "delayed" notifications arrive.
Multiple users has reported the issue and tried various workarounds such as:
- Disabling battery optimization for certain apps
- Disabling all battery optimization options
- Making sure "WIFI" connection is always maintaned, even during sleep mode
- Making sure DATA connection is always maintaned
- Restoring device to factory
- Totally replacing devices with new ones.
- Wiping cache and similar
There is currently only one temporarly solution working, which is disabling doze using adb console. This workaround is temporarly and works until next reboot. It requires setting phone to debug mode and connecting to it.
"adb shell dumpsys deviceidle disable"
Samsung is totally ignoring the technical issue since at least 6 months or more. There are multiple threads all over the web about such problem existing. Examples:
The issue is making phone totally unusuable for people who rely on instant notifications, such as alerts related to financial services like declining stock rates and similar. I dont understand why such critical thing like delivering notifications in time is totally ignored by samsung. The issue is not present on any other android phones.
If you have ability to contact someone of samsung development team, please forward this thread to make sure there will be finally reaction. Please reply to this thread if you have same issue.
I am also experiencing this same issue and tried using the smasung email app instead of the gmail app. I am using s7 with Oreo. Not sure what else to do but maybe think about going with iPhone, as much as I hate to do that.
Yep having the same issue here. Even with the phone on its delayed by 10 to 20 minutes then I get spammed with 15 notifications in one go. It's getting pretty annoying. Done everything from factory restore to reset settings settings and reset network settings Changed my sim card, got my phone provider to disable voLTE incase that was impacting notifications via shotty reception as my s7 had issues going down to 3g and 2g in bad 4g areas. Disabled battery saver, individually selected apps exempt from being put to sleep or blocked. Done everything even contacted Samsung and all they could help me with was selecting all apps to receive notifications and tell me to reset the network and reset settings. Tried downloading apps to help fix it but nothing. It's getting concerning and pretty ***** frustrating to the point I'm trying my best not to get angry and chuck this almost $2000 phone out the window cause Australia prices right? I just want them to atleast acknowledge that they have a major issue right now with all their phones. Not try to tell me that my provider is to blame or apps or anything else without accepting responsibility for a firmware update that has made this phone one expensive paperweight. Not happy 😞
Major problem for me on my S7. Late emails and push notifications not occuring until I unlock the screen. My Ipad, android tablet, and LG G3 receive notifications instantly with screen locked. I held off buying the S9 to wait for the S10 but now considering alternate to Samsung.
The exact same problem from my Note 9 here. It's amazing that a $999 flagship device from Samsung in 2018 can't get the most basic stuff right. What good is a long battery life if you don't get prompt email notifications? Who would want to use a phone that notifies your emails 10-15 minutes later than your colleagues in a workplace? Until this problem gets resolved, I'm telling everyone around me to stay away from Samsung phones.
I am having the same problem from the day one(Galaxy S9) . My provider is T-Mobile and they have sent my phone to be fixed in authorized service. They did only factory reset and said that there is no problem whatsoever. That surely left me in rage. I even tried to install PNF No-Root app that helped for a bit but the problem came back. I have also tried every possible mention of a fix online and still nothing. I can assure Samsung that no one in my area is going to buy this expensive paper holder piece of *****. Even that they won't give a sh... about that, they have lost at least 5 users min. If there is any mention of a possible fix please post it here before I break this mobile phone in half.