Delayed Notifications After ColorOS Updates on OPPO Devices
You may encounter the following issues:
Notifications arriving several minutes late
Alerts appear only when the screen is turned on
Missed calls or messages without sound or vibration
Apps running in the background but not delivering real-time alerts
⚠️ Why Does This Happen After an Update?
After a major ColorOS update, the system may automatically adjust or reset certain settings to improve performance and battery efficiency. These changes can unintentionally affect apps that rely on background activity.
Common reasons include:
Stricter battery optimization rules
Limited background app execution
Reset notification channel permissions
As a result, apps that depend on real-time syncing may be restricted until permissions are manually reviewed.
🛠 Recommended Solutions
If you’re facing delayed notifications, try the following steps:
Step 1: Disable Battery Optimization for Affected Apps
Go to: [Settings] > [Battery] > [App Battery Management]
Select the affected app and choose Allow background activity.
Step 2: Re-enable Notification Channels
Go to: [Settings] > Notifications > [App name]
Ensure all notification types are enabled, including Lock screen, Sound, and Floating notifications.
Step 3: Clear App Cache (Not Data)
Go to: [Settings] > [Apps] > [App name] > [Storage] > [Clear cache]
This helps remove temporary files without affecting your app data.
Step 4: Restart Your Device
Restarting the phone once helps the system re-register background services after the update.
📌 Important Note
This behavior is not a hardware defect. It’s a normal system adjustment that can occur after software updates and is usually resolved by fine-tuning app permissions.
✅ Summary
Delayed notifications after a ColorOS update are typically caused by tightened background and battery controls. By allowing background activity and re-enabling notification permissions, most users can restore real-time alerts quickly.
If the issue continues even after these steps, consider checking for further software updates or reaching out to OPPO Support for assistance.