add EKAttendee on EKEvent, but happen crash issue on iOS16.4

on iOS16.4, if try to add EKAttendee on EKEvent, it will cause app crash; this can not reproduce on iOS14.5/iOS15.7 etc low version.

Add Main example Attendee code: Class className = NSClassFromString(@"EKAttendee"); NSMutableArray *attendeessystem = [NSMutableArray new];

    for(int i=0; I<1;i++){

        id attendee = [className new];

       [attendee setValue:@"test" forKey:@"firstName"];
       [attendee setValue:@"hihi" forKey:@"lastName"];
       [attendee setValue:@"test@outlook.com" forKey:@"emailAddress"];
       [attendeessystem addObject:attendee];
    }

    if([attendeessystem count]>0)
    {
        [calendarEvent setValue:attendeessystem forKey:@"attendees"];
    }

crash log: *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSDictionaryM setObject:forKeyedSubscript:]: key cannot be nil'

*** First throw call stack: