[Bug]: N12_GLOBAL__N_122ExceptionObjHolderImplE crash when updating tags on background threads

[marioortizmanero]

What happened?

Description

We’re seeing intermittent production crashes stemming from OneSignalUserDefaults.saveCodeableDataForKey after calling OneSignal.User.addTag/removeTag. The stack trace indicates a C++ exception (N12_GLOBAL__N_122ExceptionObjHolderImplE) that appears whenever tag updates originate from a background thread (e.g., triggered by Superwall events or Kotlin background timers).

This issue happens at different points throughout the app - not just the initialization.

Steps to reproduce?

From a background thread, call:


OneSignal.User.addTag(key: "some_key", value: "some_value")


Allow the SDK to persist tags to user defaults.

Observe crash in OneSignalUserDefaults.saveCodeableDataForKey.

Note that I haven't been able to reproduce this myself... It's only my hypothesis - any help would be appreciated.

Another question is whether I need to call getTags in a particular thread - is it blocking, should I call on Main? etc

What did you expect to happen?

No crashes

OneSignal iOS SDK version

5.2.14

iOS version

18

Specific iOS version

see image attached

Relevant log output

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