TextField in a ListView comes into focus ✅

main.dart

import 'package:flutter/material.dart';

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

class Demo extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        home: Scaffold(
          body: ListView.builder(
            itemCount: 3,
            itemBuilder: (context, index) {
              if (index.isEven) {
                return Container(
                  height: 500,
                  color: Colors.amber
                );
              }
              return const SizedBox(
                height: 150,
                child: Center(
                  child: TextField(),
                ),
              );
            }
          ),
        ),
      );
  }
}