Have you noticed that an app seems to restart every time you switch back to it? Maybe your music stops when you open another app, notifications arrive late, or a download gets interrupted after leaving the app in the background.
That can be surprisingly annoying, especially when the phone has plenty of storage and seems to be running normally otherwise.
The good news is that apps closing in the background on Nothing Phone (3a) doesn’t always mean there’s a serious problem. Battery restrictions, memory management, buggy apps, system updates, or a particular app’s settings can all be responsible.
In this guide, I’ll walk you through the fixes I would try first, starting with the easiest ones. There’s no reason to jump straight into a factory reset.
Table of Contents
- Why apps keep closing in the background
- Restart Nothing Phone (3a)
- Check for software updates
- Update the problematic app
- Check battery restrictions
- Remove an app from Sleeping apps
- Check memory and device storage
- Clear the app cache
- Check the app’s background data
- Turn off aggressive battery-saving features temporarily
- Test the phone in Safe Mode
- Reset app preferences
- When should you consider a factory reset?
- How to prevent apps from closing again
- Frequently Asked Questions
- Final thoughts
Why Do Apps Keep Closing in the Background?
Before changing anything, it helps to understand what’s actually happening.
Android is designed to manage memory and battery automatically. When you’re using several apps, the system may stop background processes to free resources or reduce battery consumption.
That’s normal.
The problem is when an app is being closed too aggressively, particularly when you need it to continue working in the background.
Common causes include:
- Battery optimization restrictions
- Apps placed into sleeping or deep-sleep lists
- Low available memory
- Very low storage space
- A buggy app update
- Outdated system software
- Corrupted app cache
- Background-data restrictions
- Battery Saver or similar power-saving modes
- A third-party app interfering with normal operation
- Temporary system glitches
So, let’s work through the possibilities.
1. Restart Nothing Phone (3a)
Yes, we’re starting with the boring fix.
But don’t skip it.
A restart clears temporary system processes and gives Android a clean session. If background apps suddenly started closing after the phone had been running for a long time, this may be enough to solve it.
Try this:
- Open the power menu.
- Tap Restart.
- Wait for the phone to completely reboot.
- Open the app that’s giving you trouble.
- Leave it in the background for a few minutes.
- Return to the app and check whether it stayed active.
If everything works normally after restarting, you probably don’t need to make any major changes.
2. Install the Latest System Update
Software updates aren’t only about new features.
They can also contain memory-management improvements, battery fixes, security patches, and app compatibility fixes.
Go to:
Settings → Software update → Download and install
If an update is available, install it when convenient.
After updating, restart Nothing Phone (3a) and test the affected apps again.
Quick tip: If the problem began immediately after a major system update, don’t assume the update permanently damaged your phone. App developers sometimes need to release updates to catch up with new Android or One UI changes.
3. Update the Problematic App
If only one or two apps keep disappearing from memory, the problem may be with those apps rather than the phone itself.
Open the Google Play Store and check for pending updates.
Update the affected application and then test it again.
This is particularly important if the problem started after an app update or system upgrade.
4. Check Battery Restrictions
This is one of the first settings I’d investigate when an important app refuses to stay active.
Android can restrict background activity to save battery. That’s useful for apps you rarely use, but it can be inconvenient for applications that need to remain active.
For example, you might notice problems with:
- Music apps
- Messaging apps
- Navigation apps
- Fitness trackers
- Cloud-sync applications
- Download managers
- Email apps
Open:
Settings → Apps → [Choose the affected app] → Battery
Look for the available battery/background options.
Depending on your software version, you may see options such as:
- Unrestricted
- Optimized
- Restricted
If an important app is being aggressively restricted, changing its battery setting to a less restrictive option may help.
Don’t change every app to unrestricted. That can increase battery consumption. Only adjust apps that genuinely need reliable background activity.
5. Check Sleeping and Deep Sleeping Apps
Some Samsung phones use automatic battery management to put rarely used applications to sleep.
If an app has been placed into a sleeping category, it may not behave the way you expect when you’re not actively using it.
Look under:
Settings → Battery → Background usage limits
You may see categories such as:
- Sleeping apps
- Deep sleeping apps
- Never sleeping apps
The exact wording can vary depending on your software version.
If a particular app needs to keep working in the background, check whether it’s listed under sleeping or deep sleeping apps.
If necessary, remove it from that list and test it again.
6. Check Available Storage
Low storage can cause all sorts of strange behaviour.
If your phone is almost full, Android and individual applications have less room to work with.
Open:
Settings → Device care → Storage
Check how much free space remains.
If storage is nearly full, remove things you no longer need, such as:
- Old downloads
- Duplicate photos
- Unused applications
- Large videos
- Offline media
- Temporary files
You don’t need to obsess over keeping a huge amount of free storage, but leaving some breathing room is a sensible idea.
7. Check Memory Usage
If you’re running many demanding applications simultaneously, Android may close background apps simply because it needs to reclaim memory.
Open:
Settings → Device care → Memory
The exact menu may differ depending on the software version.
If memory usage is consistently high, close applications you’re no longer using and see whether the problem improves.
You can also restart the phone and test the same workload again.
Here’s an important distinction
An app disappearing from the Recent apps screen isn’t necessarily the same thing as Android completely stopping all of its background services.
Android deliberately manages background processes.
So don’t assume that every app must remain permanently loaded in memory.
8. Clear the Problematic App’s Cache
A damaged or outdated cache can occasionally cause unusual app behaviour.
If one particular application keeps restarting or closing, clearing its cache is worth trying.
Go to:
Settings → Apps → [App name] → Storage → Clear cache
Then reopen the application.
Important
Start with Clear cache.
You don’t necessarily need to use Clear data.
Clearing data can sign you out of the app and remove locally stored app information, depending on how that particular app works.
If you eventually need to use Clear data, make sure important information is backed up or synchronized first.
9. Check Background Data Restrictions
Some applications need background internet access to keep notifications, synchronization, and other services working.
If background data has been restricted, the app may appear to stop working whenever you leave it.
Check:
Settings → Apps → [App name] → Mobile data
Look for options related to:
- Allow background data usage
- Allow data usage while Data Saver is on
The exact labels can differ by Android or One UI version.
If notifications or synchronization stop whenever the app isn’t open, this is especially worth checking.
10. Temporarily Disable Battery Saver
Battery-saving modes are useful when you’re trying to squeeze more life out of your phone.
However, aggressive power-saving settings can restrict background activity.
If apps started closing after enabling a battery-saving mode, temporarily turn it off and test again.
You can usually find the relevant controls under:
Settings → Battery
If the apps behave normally with Battery Saver disabled, you’ve probably found an important clue.
You can then decide which battery-saving features are worth keeping enabled.
11. Remove Recently Installed Apps
Think back to when the problem started.
Did you install a new:
- Battery manager?
- Cleaner?
- Launcher?
- VPN?
- Security application?
- Automation tool?
- RAM optimizer?
- Performance booster?
Some third-party utilities can interfere with Android’s normal background management.
If the problem began soon after installing an application, uninstall it temporarily.
Then restart Nothing Phone (3a) and test the apps again.
12. Test Nothing Phone (3a) in Safe Mode
Still having problems?
Safe Mode is useful because it lets you test whether a downloaded application is interfering with the phone.
The exact steps can vary slightly by software version, but on many Samsung devices you can enter Safe Mode through the power menu.
Try this:
- Open the power menu.
- Touch and hold Power off.
- Select Safe mode when it appears.
- Allow the phone to restart.
- Test the background-app problem.
Downloaded applications are disabled while Safe Mode is active.
What does the result tell you?
If the problem disappears in Safe Mode:
A third-party application may be responsible.
If the problem continues in Safe Mode:
The cause is more likely related to system settings, software, or another underlying issue.
Once you’re finished testing, restart the phone normally to leave Safe Mode.
13. Reset App Preferences
If several applications are behaving strangely, resetting app preferences can be a useful middle-ground solution.
This does not perform a factory reset.
Look for:
Settings → Apps → More options → Reset app preferences
The wording or location can vary by software version.
Resetting app preferences can restore certain default app settings, permissions, and related preferences.
You may need to configure some app permissions or defaults again afterward.
14. Don’t Use RAM Cleaner Apps Unless You Actually Need Them
This deserves a special mention.
You may find apps claiming that they can dramatically improve Android performance by constantly killing background applications.
In many cases, Android’s own memory management is better suited to handling this job.
Repeatedly killing apps can even be counterproductive because Android may need to reload them from scratch later.
If you’re troubleshooting background apps, I’d first use the settings already built into Nothing Phone (3a) rather than installing another “RAM booster.”
15. Factory Reset: Only as a Last Resort
If you’ve tried everything above and the problem affects multiple applications, a factory reset is an option.
But don’t rush into it.
A factory reset removes your personal data and returns the phone to its setup state.
Before considering it:
- Back up important photos and videos.
- Sync contacts.
- Check your messaging-app backups.
- Back up important documents.
- Make sure you know your account passwords.
- Confirm that important app data is synchronized.
Then, if you’re ready:
Settings → General management → Reset → Factory data reset
The menu may look slightly different depending on your software version.
After the reset, test the phone before reinstalling every application. This is important because it can help determine whether a downloaded app was responsible.
Quick Fix Checklist
If you don’t want to read through the entire guide again, here’s the short version:
| Problem | What to try |
|---|---|
| One app keeps closing | Update it and clear its cache |
| Notifications are delayed | Check background data and battery restrictions |
| Music stops playing | Check battery/background restrictions |
| Several apps close | Check memory, storage and system updates |
| Problem started after installing an app | Remove the recently installed app |
| Apps work normally in Safe Mode | Look for a third-party app |
| Apps remain broken after troubleshooting | Reset app preferences |
| Nothing works | Consider a backup and factory reset |
How to Prevent Background Apps From Closing Again
Once you’ve fixed the problem, a few habits can help prevent it from returning.
Keep Android and your apps updated
Don’t ignore regular software and application updates. They often contain compatibility and stability fixes.
Avoid unnecessary cleaner apps
Let Android handle memory management unless you have a specific reason to use another tool.
Don’t restrict every application
Battery optimization is useful, but some apps genuinely need background access.
Keep enough storage available
A completely full phone can create problems beyond background apps.
Watch for patterns
If one particular application repeatedly causes trouble, don’t automatically blame the phone.
It may simply be that application’s bug.
Frequently Asked Questions
Why do apps keep closing in the background on Nothing Phone (3a)?
Common causes include battery restrictions, sleeping apps, low available memory, outdated software, app bugs, background-data restrictions, and third-party applications.
How do I stop an app from being closed in the background?
Check the app’s battery settings and make sure it isn’t being aggressively restricted or placed into a sleeping/deep-sleeping category.
Why do my notifications arrive late?
Delayed notifications can sometimes happen when an app is restricted from running in the background. Check its battery and background-data settings.
Should I clear app data?
Not as your first step. Try Clear cache first. Clearing app data may remove local settings or sign you out.
Does closing all recent apps improve performance?
Not necessarily. Android already manages memory automatically. Constantly closing apps can make frequently used applications reload more often.
Should I factory reset Nothing Phone (3a)?
Only if you’ve exhausted the simpler solutions and the problem continues across multiple applications. Always back up your important data first.
Why does the problem disappear in Safe Mode?
If everything works correctly in Safe Mode, a downloaded application is a strong suspect because third-party apps are disabled during the test.
Final Thoughts
When apps keep closing in the background on Nothing Phone (3a), it’s easy to assume there’s something seriously wrong with the phone.
Usually, though, there’s a much simpler explanation.
Start with the basics: restart the phone, install updates, check battery restrictions, look at sleeping apps, and clear the affected app’s cache. If the problem continues, Safe Mode is one of the best ways to determine whether a third-party application is involved.
And don’t jump straight to a factory reset. That’s the nuclear option, not the first troubleshooting step.
If you’ve recently noticed this issue after a software update, app installation, or battery-setting change, that timing can also provide a useful clue about what’s actually causing the problem.
Related Guides
- How to Fix Apps Not Updating on Nothing Phone (3a)
- How to Fix Nothing Phone (3a) Battery Drain Problems
- How to Clear Cache on Nothing Phone (3a)
- How to Fix Nothing Phone (3a) Overheating Issues
- How to Fix Nothing Phone (3a) Notifications Not Working
- How to Improve Battery Life on Nothing Phone (3a)
- How to Fix Nothing Phone (3a) Running Slow
