Share singleton from Objective C to Swift

I am trying to access an Objective C singleton from Swift, however I only seem to get the initial value created in the init function of the singleton. The flightControllerState object exposed is updated in a delegate function and I can see that the value is properly updated on the Objective C side.

I have followed a few different posts here on SO and also this article on how to call the shared object from Swift. (I should also mention this is running inside a react native project if that may have any impact?)

Objective-C Singleton

@import DJISDK;@interface RCTBridgeDJIFlightController : RCTEventEmitter<DJIFlightControllerDelegate> {    DJIFlightControllerState *flightControllerState;}@property(nonatomic, readonly) DJIFlightControllerState *flightControllerState;+ (id)sharedFlightController;@end@implementation RCTBridgeDJIFlightControllerDJIFlightControllerState *flightControllerState;@synthesize flightControllerState;+ (id)sharedFlightController {        static RCTBridgeDJIFlightController *sharedFlightControllerInstance = nil;        static dispatch_once_t onceToken;        dispatch_once(&onceToken, ^{            sharedFlightControllerInstance = [[self alloc] init];        });        return sharedFlightControllerInstance;    }    - (id)init {    // I also tried this to make sure the shared instance was returned but no luck    //if (sharedFlightControllerInstance != nil) {    //    return sharedFlightControllerInstance;    //}    if (self = [super init]) {        flightControllerState = nil;    }    return self;    }    -(void)flightController:(DJIFlightController *)fc didUpdateState:(DJIFlightControllerState *)state {    flightControllerState = state;    }@end

Swift class calling singleton and accessing values

class VirtualStickController {  var flightControllerSharedInstance: RCTBridgeDJIFlightController  override init() {      self.flightControllerSharedInstance = RCTBridgeDJIFlightController()  }  func getFlightControllerState() {      if let state = flightControllerSharedInstance.flightControllerState {      print("FLIGHT CONTROLLER STATE: \(state)") // always null    } else {      print ("NULL")    }  }