[LeEco Le Pro3 Guides, News, & Discussion] suhridkhan:
First of all, this thread is not for ranting about the issue. This is about finding a solution. So, please save your rants for other threads.

Many users are reporting notification problems using their LeEco Le Pro 3. I actually refuse to call it a problem. EUI is very aggressive about the memory and power management. And these options are by default turned on. There are few tools available that can allow apps to run more freely in the background. I absolutely hate that stock android doesn't provide any such tool to limit wakelocks or control apps running in the background. So, for every android phones I have used in the past, I used Greenify, Amplify, AppOps to gain those controls.

Now obviously we don't want all of the apps to get limited. A smartphone is about connectivity, and timely syncing is essential for some of the apps. Below are some of the steps that can be taken to get more control of the apps running in the background.

1. Notification Management

Go to Settings>Notification management

Set as 'Important notice' for all the apps you need more frequent notification from.

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2. Disable Auto Cleaning

EUI automatically cleans up app from memory. Disable it for the apps which you need to run in the background.

Go to Phone Manager > Power saving management > App protection

Disable auto cleaning for the necessary apps. I recommend having it enabled for your launcher, if you are using a 3rd party one.

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This can also be accessed from the recents menu. Pull down on the desired apps to keep it in memory. This is sometimes useful, because for whatever reason, not all the apps are listed on the previous menu.

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2. Sleep Mode Clean up.

Go to Phone Manager > Power saving management

a. Disable Lock-screen cleanup. (This works like the greenify app, once the screen goes off, the background apps get killed)

b. Disable Ultra-long standby during sleep. (Phone basically goes to power-saving mode at night)

Chose depending on what you need. I am keeping the Ultra-long standby on, but Lock-screen clean up off.

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3. Wakelock Limit

This works like the Amplify app, but unfortunately we don't have control on which wakelocks to block.

Go to Phone Manager > Power saving management > Align wake up

Disable the options you prefer. They are self-explanatory. I have both of them on, but not having any sync issues with the apps I care about.

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4. Auto Launch Limit

Self Explanatory. I used to access this option form AppOps module. Manages which apps can wake up the device from sleep. Enable for apps needed.

Go to Phone Manager > Privacy safety > Manage Auto Launch

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5. Background resource control

Dial *#*#46360000#*#* and uncheck 'Enable background resource control'.​

Of course all these steps are gonna take a toll on the battery to some extent. Play with the settings as you wish. Every people has different needs. Choose whatever works best for you. Feel free to share your observations and recommendations. I shall update this thread accordingly.

LeEco's latest update actually disabled most of these battery saving features by default. All apps are allowed to run in the background and wake by themselves. So, you may want to do the opposite now. Block wakelock and restrict background operation for the apps you do not want.