(iOS) Word embedding vector is nil when using text from SwiftUI TextField

Question

I'm building an emoji search bar where you can type and get the relevant emojis to show up - similar to what Apple does on its keyboard. For that, I've precomputed static word embeddings for all the emojis and saved it in a .mlmodel file. My task is to compute the word embedding for the search query and look it up in the mlmodel.

Issue: Whenever I try to call NLEmbedding.vector(for: String) method, it returns a nil value. This happens only when the parameter is linked to a SwiftUI @State var. If it is a String literal, than it works perfectly fine.

Here's a miniumum reproducible example for the same.

import SwiftUI
import NaturalLanguage

struct ContentView: View {

    @State private var searchText = ""

    var body: some View {
        VStack {
            TextField("Search emojis", text: $searchText)
                .padding()
                .background(Color.gray.opacity(0.1))
                .cornerRadius(12)
                .onChange(of: searchText, perform: searchEmojis(forQuery:))
        }
        .padding()
    }

   private func searchEmojis(forQuery text: String) {
        guard let embedding = NLEmbedding.wordEmbedding(for: .english) else { return }
        let queryVector = embedding.vector(for: text) // Works fine for a string literal
        print("Query vector: \(queryVector)") // Returns a nil vector
    }
}

What I'm looking for: A way to retrieve user input and compute the word embedding dynamically.