App Lock on the OnePlus 15 is designed to keep your private apps protected with a PIN, pattern, or biometric security. When it stops working, locked apps may open without authentication or fail to lock at all. This usually happens because of permission issues, battery restrictions, or misconfigured security settings, and most of the time, you can fix it in just a few minutes.
Why App Lock Is Not Working on Your OnePlus 15
- App Lock is turned on, but no apps are selected.
- Required permissions for App Lock are disabled.
- Battery optimization is restricting App Lock from running in the background.
- Fingerprint or face unlock settings are not synced properly with App Lock.
- Temporary system glitches after an update or restart.
1. Make Sure App Lock Is Turned On and Apps Are Added
App Lock will not work unless it is enabled and specific apps are selected. Many users turn on App Lock but forget to add apps, which makes it seem like the feature is broken.
Open Settings, and then tap Privacy.
Tap App Lock, and then turn it on and select the apps you want to lock.
2. Check App Lock Permissions
App Lock needs permission to run properly in the background. If these permissions are restricted, the lock screen may not appear when opening protected apps.
Open Settings, and then tap Apps.
Tap App Lock, and then allow all required permissions, including background access.
3. Disable Battery Optimization for App Lock
Battery optimization can stop App Lock from working consistently. This is common on newer devices that aggressively manage background activity.
Open Settings, and then tap Battery.
Tap App battery management, and then set App Lock to Unrestricted.
4. Reconfigure Fingerprint or Face Unlock
If App Lock relies on biometric authentication, outdated or corrupted biometric data can cause it to fail. Resetting your biometrics often restores proper functionality.
Open Settings, and then tap Security and privacy.
Tap Fingerprint or Face unlock, and then re add your biometric data.
5. Restart the OnePlus 15
A restart refreshes system services and clears temporary bugs that may affect App Lock. This simple step fixes many security related issues.
Swipe down from the top of the screen to open Quick Settings.
Tap the Power icon, and then tap Restart.
6. Turn App Lock Off and On Again
Refreshing App Lock settings can fix internal conflicts. This forces the system to reload the feature and apply your preferences correctly.
Open Settings, and then tap Privacy.
Tap App Lock, and then turn it off and turn it back on.
App Lock issues on the OnePlus 15 are usually tied to permissions or background restrictions, not hardware problems. Once App Lock is properly configured and allowed to run freely, it should protect your apps reliably again.
FAQs
Why does App Lock disappear after I restart my OnePlus 15?
This usually happens when App Lock is restricted by battery optimization or background limits. Setting it to Unrestricted prevents the feature from being disabled after restarts.
Can App Lock work without fingerprint or face unlock?
Yes. You can use a PIN or pattern instead. Biometric options are optional and only add convenience.
Does App Lock protect apps from recent apps view?
App Lock prevents access when opening an app, but it does not hide app previews in the recent apps screen. You may need additional privacy settings for that behavior.
