Windows colored output is mixed up when running in cmd.exe

[segrey]

Windows 10 (version 2004)
go version go1.14.2 windows/amd64

Steps to reproduce:

1. Create "mixed-output.go"

package main

import (
    "fmt"
    "github.com/mattn/go-colorable"
    "sync"
)

func main() {
    stdout := colorable.NewColorableStdout()
    wg := &sync.WaitGroup{}
    for i := 0; i < 3; i++ {
       wg.Add(1)
       go func() {
           _, _ = fmt.Fprintln(stdout, "\u001b[32mHello\u001b[0m", "World")
           wg.Done()
       }()
    }
    wg.Wait()
}

2. Open Command Prompt (cmd.exe) and cd to file's parent folder.
3. go build mixed-output.go
4. Run mixed-output.exe, the output is mixed.

Mixed output:

Works fine in Git bash (MinGW):

[kolkov]

Thanks!

[mattn]

Thank you too.