App "Notifications" are Delayed by Hours
4.5
You get a WhatsApp message at 2 PM, but the notification only pops up at 5 PM.
Symptoms
- Late alerts
- Batch notifications
- Sync lag
Possible Causes
- Aggressive battery saving
- "Doze" mode (Android)
- Unstable background data
Step-by-Step Fix
1
Disable Battery Optimization
Settings > Apps > [App] > Battery > Set to "Unrestricted".
2
Enable "Background Data"
Ensure the app can use data even when you aren't looking at it.
3
Disable "Adaptive Battery"
System-wide setting that can delay low-priority notifications.
When to See a Technician
Modern phones "kill" background apps to save battery; if an app is killed, it can't tell you about new messages.
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