[Bug] MAUI App Crashes/Freezes on Debugging (iOS & Android) with Real Device

[ikeoriaku123]

Description

When running a .NET MAUI app on a real iOS or Android device using Visual Studio Code in debug mode, the app runs successfully only after following a strict sequence:

Delete bin and obj folders
Perform a clean build
Restore dependencies
Rebuild the project
Delete the app from the device
Deploy and run the app

However, when attempting to re-run the app without repeating the above steps, the application either crashes on startup or freezes. This forces me to repeat the entire cycle again.

Steps to Reproduce

1. Run the MAUI app on a real device (iOS/Android) using Visual Studio Code in debug mode.
2. The app works only after deleting bin/obj, cleaning, restoring, rebuilding, and deleting the app from the device.
3. Stop debugging and attempt to run the app again.
4. The app either crashes on launch or freezes.
5. Repeating the cleanup cycle is necessary for it to work again.

Expected Behavior
The app should run consistently in debug mode without requiring a full clean-up and rebuild every time.
Actual Behavior
The app crashes or freezes unless the cleanup steps are performed before every debug session.

Additional Information
.NET MAUI Version: [Provide your MAUI version]
Visual Studio Code Version: [Provide VS Code version]
Operating System: [Windows/macOS + version]
Target Devices: [iOS version / Android version & model]
Any Exception Logs?: [Attach logs if available]

Link to public reproduction project repository

No response

Version with bug

9.0.14 SR1.4

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

8.0.90 SR9

Affected platforms

iOS, Android, macOS

Affected platform versions

iOS 15.8, iOS 18, Android 10

Did you find any workaround?

The workaround is going through that annoying cycle

Relevant log output

---

You may only use the Microsoft Visual Studio .NET/C/C++ Debugger (vsdbg) with
Visual Studio Code, Visual Studio or Visual Studio for Mac software to help you
develop and test your applications.

The program 'App.Client.Maui.dll' has exited with code 0 (0x0).
[rom.arcrom] Late-enabling -Xcheck:jni
[rom.arcrom] Unquickening 22 vdex files!
[rom.arcrom] The ClassLoaderContext is a special shared library.
[LoadedApk] LoadedApk::makeApplication() appContext=android.app.ContextImpl@c5c149e appContext.mOpPackageName=com.mypackage appContext.mBasePackageName=com.mypackage appContext.mPackageInfo=android.app.LoadedApk@1b11b7f
2
[NetworkSecurityConfig] No Network Security Config specified, using platform default
[DOTNET] AndroidCryptoNative_InitLibraryOnLoad: jint AndroidCryptoNative_InitLibraryOnLoad(JavaVM *, void *) in /__w/1/s/src/native/libs/System.Security.Cryptography.Native.Android/pal_jni.c
[DOTNET] GetOptionalClassGRef: optional class com/android/org/conscrypt/OpenSSLEngineImpl was not found
[monodroid] Failed to create directory '/data/user/0/com.mypackage/files/.override/armeabi-v7a'. File exists
[monodroid] Creating public update directory: /data/user/0/com.mypackage/files/.__override__/armeabi-v7a
[rom.arcrom] Attempt to remove non-JNI local reference, dumping thread
[monodroid-debug] Trying to initialize the debugger with options: --debugger-agent=transport=dt_socket,loglevel=0,address=127.0.0.1:51507,server=y,embedding=1,timeout=-459748843

[ikeoriaku123]

This is also happening in version 9.030

[jfversluis]

Without any reproduction or logs of any kind it will be impossible for us to determine what might be going on here or where the source of this issue might be.

If you revert back to 8.0.90 SR9 does it then work again? Or is it still broken now in this state? Are you able to test this project on Windows with Visual Studio? Does that show the same behavior? Does it only happen with a certain project or if you start a new project does it happen there as well?

[ikeoriaku123]

@jfversluis I haven't reverted back to 8.0.90 SR9. I still do get the issue with 8.0.90 SR9 but not as frequent as now. The interesting is that I am not seeing any logs or any reason for the crash which makes it more difficult. I have tried deleting and reinstalling visual studio code but to no avail. I cannot use visual studio for mac as it's been retired. Am I the only one experiencing this issue. I know I have seen some complaining but not on github

[ikeoriaku123]

@jfversluis please find logs updated at Relevant log output. The crash is more frequent with maui android and UIs becoming unresponsive. I need help. I don't want to give up on maui. I will continue to update logs if different

[Zhanglirong-Winnie]

Could you provide us with a sample project so we can investigate it further? Looking forward to your reply!

[jfversluis]

Unfortunately it would seem like that so far you're the only one or one of a few people that seem to experience this. At least, I haven't heard it before. Do you have the option to try on another machine? Does it behave better there?

If you run a Windows/macOS app? Does it freeze then? And what exactly freezes? The .NET MAUI app you have deployed or Visual Studio Code as a whole? Does it happen with all .NET MAUI projects or just 1 in particular?

[dotnet-policy-service]

Hi @ikeoriaku123. We have added the "s/needs-info" label to this issue, which indicates that we have an open question for you before we can take further action. This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.