[OnePlus 3T Questions & Answers] roadrunnerx7:
(for the direct question, see the last paragraph)

Hello,

I'm currently on the stock Oxygen OS 5.0.1 ROM, but I'm having issues with push notifications not working properly or at all in some in cases. I recently switched jobs and I now NEED to have my emails, and specifically push notifications from a specific app(its called Goshare Driver), to arrive ASAP. Currently I'm not get any notifications ever from the app I need, and Gmail notifications randomly will arrive very delayed.

I've tried the following to fix the problem, with no success:

-Making sure the apps have notifications turned on

-setting the notifications for Gmail to Urgent priority

-I tried giving the apps unrestricted data access

-setting notifications to override do not disturb/making sure do not disturb was off

-turning off battery optimization for Goshare. I can't turn it off for Gmail because all the Google apps and system apps do not appear. And the battery optimization link from Gmail app info just takes me to all the apps instead of only Gmail, but again, gmail doesn't appear

-making sure advanced battery optimization is off, it was never on

-i tried completely turning off doze from the developer options menu

-i tried wiping the cache for each app

-i tried wiping the cache from the boot menu

-i tried a full factory reset

-i tried installing an app called "push notification fixer"

-i tried going to apps > special access > notification access, but it's empty

-I tried contacting OnePlus, they don't even seem to understand what the problem is and keep wasting my time telling me to do things I already directly told them I tried

-I also tested the app on my former phone, the Nexus 5. It still has stock Marshmallow, during testing the push notifications did come thru, sometimes immediately, but usually very delayed or only after I woke up the phone. I'd also get a ton of emails at once. But the testing proved it's not the app, or at least I don't think so, because I'm not getting ANY notifications EVER on the OnePlus. My guess is either the problem is the OnePlus 3T stock ROM, or Android itself.

I've heard that some custom ROMs don't have anywhere nearly as many issues as the stock ROM. I did some research and it SEEMS like the most stable/supported ROMs are from lineage OS, OmniRom, and Paranoid android. I've been out of the rooting game for while, since the galaxy nexus, so I'm not sure which to choose. What do you guys recommend is the most stable all around, and especially for notifications, work-oriented/stable ROM for the OnePlus 3T?

I don't care if its Android Oreo or Nougat or Marshmallow, I just want/NEED the most stable, working ROM. I don't really have time to do any testing, I already wasted a lot of time with the factory reset and OnePlus support. For my work I need the calling, GPS/Google Maps, push notifications, Gmail, data to work flawlessly. If you guys can give me any recommendations for which ROM to install, or if its also a waste of time and no ROM will fix this phone/OS, please let me know. From what I've heard the app I need works just fine on the iPhone, and as much as I'd hate to switch, I kinda have no choice if push notifications won't work properly on Android. Thanks in advance.

PS. If the is the wrong forum, please let me know where is the proper place to post, thanks!