Text widget with wrong emoji on initialization in Flutter

I want to display an emoji within a text widget, using Flutter.

When I copy an example emoji from the internet, some of them shows up with 2 characters in my IDE.

E.g:

static String dualCharEmoji = "⚔️";static String singleCharEmoji = "🗡";

When I use this variable in the text widget, both of them work fine:

Text("⚔️",)Text("🗡",)

However, only when first running the app, the dual character emoji shows up as its first character only.

i.e. Only when first opening the app, the sword icon shows up as ⚔ instead of as ⚔️

After it gets reloaded it gets fixed, and hot reloading/hot restarting does not makes it bug again.

My question is:

Is this a bug? Am I missing some detail here? Why does it only happen when first opening the app?

How can I show a 2 sized emoji from the start?

I'm using the following Flutter version:

>flutter --versionFlutter 1.9.1+hotfix.4 • channel stable • https://github.com/flutter/flutter.gitFramework • revision cc949a8e8b (9 weeks ago) • 2019-09-27 15:04:59 -0700Engine • revision b863200c37Tools • Dart 2.5.0

See the minimum reproducible example below:

import 'package:flutter/material.dart';void main() => runApp(MyApp());class MyApp extends StatelessWidget {  Widget build(BuildContext context) {    return MaterialApp(      title: 'Flutter Demo',      home: MyHomePage(),    );  }}class MyHomePage extends StatefulWidget {  MyHomePage({Key key}) : super(key: key);  @override  _MyHomePageState createState() => _MyHomePageState();}class _MyHomePageState extends State<MyHomePage> {  static String dualCharEmoji = "⚔️";  static String singleCharEmoji = "🗡";  String text = dualCharEmoji;  int count = 0;  void swapText() {    setState(() {      if (count % 2 == 0)        text = singleCharEmoji;      else        text = dualCharEmoji;      count++;    });  }  @override  Widget build(BuildContext context) {    return Scaffold(      body: Center(        child: Column(          mainAxisAlignment: MainAxisAlignment.center,          children: <Widget>[            Text(              text,              style: TextStyle(fontSize: 50),            ),          ],        ),      ),      floatingActionButton: FloatingActionButton(        onPressed: swapText,      ),    );  }}