Listener event not triggered when document is updated (Google Firestore) – Ios swift

I am struggling to understand why my event listener that I initialize on a document is not being triggered whenever I update the document within the app in a different UIViewController. If I update it manually in Google firebase console, the listener event gets triggered successfully. I am 100% updating the correct document too because I see it get updated when I update it in the app. What I am trying to accomplish is have a running listener on the current user that is logged in and all of their fields so i can just use 1 global singleton variable throughout my app and it will always be up to date with their most current fields (name, last name, profile pic, bio, etc.). One thing I noticed is when i use setData instead of updateData, the listener event gets triggered. For some reason it doesn’t with updateData. But i don’t want to use setData because it will wipe all the other fields as if it is a new doc. Is there something else I should be doing?

Below is the code that initializes the Listener at the very beginning of the app after the user logs in.

    static func InitalizeWhistleListener() {
        let currentUser = Auth.auth().currentUser?.uid

        let userDocRef = Firestore.firestore().collection("users").document(currentUser!)
        WhistleListener.shared.listener = userDocRef.addSnapshotListener { documentSnapshot, error in
            guard let document = documentSnapshot else {
                print("Error fetching document: (error!)")
                return
            }
            guard let data = document.data() else {
                print("Document data was empty.")
                return
            }

            print("INSIDE LISTENER")
        }
    }

Below is the code that update’s this same document in a different view controller whenever the user updates their profile pic

    func uploadProfilePicture(_ image: UIImage) {

        guard let uid = currentUser!.UID else { return }
        let filePath = "user/(uid).jpg"
        let storageRef = Storage.storage().reference().child(filePath)

        guard let imageData = image.jpegData(compressionQuality: 0.75) else { return }

        storageRef.putData(imageData) { metadata, error in
            if error == nil && metadata != nil {
                self.userProfileDoc!.updateData([
                    "profilePicURL": filePath
                ]) { err in
                    if let err = err {
                        print("Error updating document: (err)")
                    } else {
                        print("Document successfully updated")
                    }
                }
            }
        }
    }