# iOS/Unity: Hang on exit in System\_FMOD\_Studio\_System\_Release (FMOD 2.02.28)

**URL:** <https://qa.fmod.com/t/ios-unity-hang-on-exit-in-system-fmod-studio-system-release-fmod-2-02-28/23181>\
**Category:** Unity\
**Created:** [July 21, 2025, 1:11pm UTC](https://qa.fmod.com/t/ios-unity-hang-on-exit-in-system-fmod-studio-system-release-fmod-2-02-28/23181 "2025-07-21T13:11:10Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![li\_fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/li_fmod/32/6577_2.png) [@li\_fmod](https://qa.fmod.com/u/li_fmod)\
**Post date:** [July 25, 2025, 12:44am UTC](https://qa.fmod.com/t/ios-unity-hang-on-exit-in-system-fmod-studio-system-release-fmod-2-02-28/23181/2 "2025-07-25T00:44:04Z")

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Hi,

Thank you for sharing the version number and crash report!

To help me investigate this further, could you please try the following steps:

1. **Set FMOD’s Logging Level to “Log”**  
You can do this in **FMOD → Edit Settings** by setting the [Logging Level to “Log”](https://www.fmod.com/docs/2.02/unity/settings.html#logging-level).
2. **Enable API Error Logging**  
Please also [enable API Error Logging](https://www.fmod.com/docs/2.02/unity/settings.html#enable-api-error-logging) in the same settings panel.
3. **Capture a Runtime Log**  
Since the issue occurs on iOS, you’ll likely need to retrieve the logs directly from the device (e.g. using the Xcode Console or `Console.app` on macOS).

Once you’ve captured the logs from a run where the issue reproduces, feel free to share them here so I can take a closer look.

> [@saintnicolas](#):
>
> The iOS version of our Unity game, with FMOD 2.02.28, consistently crashes on exit (when the user enters the task switcher and swipes away the app’s thumbnail). It looks like `System_FMOD_Studio_System_Release` hangs and iOS eventually kills the application.

In the meantime, this discussion might be relevant to your case:  
[FMOD waiting for user code in FMODUnity.dll to finish Executing - #8 by Leah\_FMOD](https://qa.fmod.com/t/fmod-waiting-for-user-code-in-fmodunity-dll-to-finish-executing/21260/8)

It touches on potential causes like long-running callbacks blocking shutdown, which might also apply here.

Let me know how you go with the logging setup!

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_[View the full topic](https://qa.fmod.com/t/ios-unity-hang-on-exit-in-system-fmod-studio-system-release-fmod-2-02-28/23181)._