PopupMenuItem/PopupMenuButton gets misplaced when inside a ReorderableListView>ListTile (flutter 1.0.0)

main.dart

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

const title = "PopupMenuButton test";

class MyItem {
  MyItem(this.icon, this.title);

  final IconData icon;
  final String title;
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: title,
      theme: ThemeData(
        primarySwatch: Colors.pink,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  List<MyItem> _sampleItems;
  bool _reorderable;

  @override
  void initState() {
    super.initState();
    _reorderable = true;

    _sampleItems = [
      MyItem(Icons.ac_unit, "Item 1"),
      MyItem(Icons.access_alarm, "Item 2"),
      MyItem(Icons.accessibility, "Item 3"),
      MyItem(Icons.accessible, "Item 4"),
    ];
  }

  Widget _buildOptions(MyItem item) {
    return PopupMenuButton(
      itemBuilder: (BuildContext context) {
        return [
          new PopupMenuItem(child: new Text("edit"), value: "edit"),
          new PopupMenuItem(child: new Text("delete"), value: "delete"),
        ];
      },
      onSelected: (selected) async {
        await showDialog(context: context,
          builder: (BuildContext context) {
            return SimpleDialog(
              title: Text(selected),
              contentPadding: EdgeInsets.all(25.0),
              children: <Widget>[Text("Item [${item.title}], Operation [$selected].")],
            );
          }
        );
      },
    );
  }

  Widget _buildListTile(BuildContext context, MyItem item) {
    return ListTile(key: Key(item.title),
      leading: Icon(item.icon),
      title: Text(item.title),
      trailing: _buildOptions(item),
    );
  }

  Widget _buildReorderableListView(BuildContext context) {
    return ReorderableListView(
      children: _sampleItems
                  .map((MyItem item) => _buildListTile(context, item)).toList(),
      onReorder: (oldIndex, newIndex) {
        setState(() {
          if (newIndex > _sampleItems.length) newIndex = _sampleItems.length;
          if (oldIndex < newIndex) newIndex--;

          MyItem item = _sampleItems[oldIndex];
          _sampleItems.remove(item);
          _sampleItems.insert(newIndex, item);
        });
      },
    );
  }

  Widget _buildListView(BuildContext context) {
    return ListView(
      children: _sampleItems
                  .map((MyItem item) => _buildListTile(context, item)).toList(),
    );
  }

  Widget _buildSwitch(BuildContext context) {
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceBetween,
      children: <Widget>[
        Text(_reorderable ? "Using ReorderableListView": "Using ListView"),
        Switch.adaptive(value: _reorderable, onChanged: (bool value) => setState(() => _reorderable = value)),
      ],
    );
  }

  Widget _buildBody(BuildContext context) {
    return Container(
      padding: EdgeInsets.all(10.0),
      child: Column(
        children: <Widget>[
          _buildSwitch(context),
          Expanded(
            child: _reorderable
              ? _buildReorderableListView(context)
              : _buildListView(context)
          ),
        ],
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text(title)),
      body: _buildBody(context),
    );
  }
}