I am observing a crash in my app from mixpanel and I think this is related
These two following lines might be culprits In MixPanel.m file and unarchiveProperties method.
self.people.unidentifiedQueue = [NSMutableArray arrayWithArray:properties[@"peopleUnidentifiedQueue"]] ?: [NSMutableArray array];
self.shownNotifications = [NSMutableSet setWithSet:properties[@"shownNotifications"]] ?: [NSMutableSet set];
showNotifications should be NSMutableSet and the above line is not setting this to NSMutableSet.
Please refer to the attachment -Modified.png.
Stacktrace is also attached.
Crash happening mostly on iPad and iOS13.7 and above, while in Background.