App crashes for some users on iOS iOS 15.3.1

We are facing crash at user's end and we don't have reproducible steps. Sharing the stack trace.  If someone can help me debug this crash log or point me in the right direction I would be really grateful. Thanks in advance.

Do you use Flutter ? Please also tell on which thread the crash occurs.

Yes we are using Flutter also and the crash is occuring in main thread.

Is there any update? Any help will be appreciated.

App crashes for some users on iOS iOS 15.3.1
 
 
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