Why is My MIUI 14 (Android 13) FCM Still Intermittent After Lockscreen?

MIUI 14 running Android 13 with Google Mobile Services version 23.37 seems to be experiencing an issue where Firebase Cloud Messaging (FCM) notifications are still intermittent after the device locks. This troubles users who miss crucial notifications. While Google Services updates might be a contributing factor, it's important to investigate further. Here are some potential causes and troubleshooting steps:

**Possible Causes:**

* **Recent Google Service Updates:** As mentioned, recent updates to GMS could be causing compatibility issues with MIUI 14's FCM handling.
* **MIUI Settings:** Certain MIUI settings related to battery optimization or app permissions might be interfering with FCM.
* **App-Specific Issues:** The issue might not be with FCM itself, but rather a problem within the app sending the notifications.
* **Background Processes:** MIUI 14's resource management could be limiting background processes required for FCM to function properly when the screen is locked.

**Troubleshooting Steps:**

1. **Check for MIUI Updates:** Ensure your MIUI 14 is running the latest version. Updates often include bug fixes and performance improvements that may address this issue.

2. **Review App Permissions:** Go to your device's settings and check the permissions granted to the app sending the notifications. Ensure it has the necessary access to notifications and background activity.
3. **Disable Battery Optimization:** Temporarily disable battery optimization for the app in question. This might help ensure the app remains active enough to receive and deliver notifications.
4. **Clear App Cache and Data:** Clearing the app's cache and data can sometimes resolve notification issues. However, be aware that this will also delete the app's saved settings and data. **Make sure to back up any important information before doing this.**
5. **Check for App Updates:** Ensure the app sending the notifications is up to date. Newer versions often include bug fixes and improvements.
6. **Restart Your Device:** A simple reboot can sometimes refresh the system and resolve temporary glitches.
7. **Contact MIUI Support:** If the problem persists, consider contacting Xiaomi's MIUI support for further assistance.

8. **Explore Alternative Notification Apps:** As a last resort, you could try using a different notification app to see if the issue is specific to the current one.

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