Using uilive to render multiple outputs

[Wulfheart]

I tried to use uilive to make multiple parallel spinners work based on this comment on stackoverflow.

The code itself looks like this:

package main

import (
	"fmt"
	"github.com/gosuri/uilive"
	"github.com/theckman/yacspin"
	"io"
	"time"
)

func main() {
	writer := uilive.New()
	writer2 := writer.Newline()
	writer.Start()
	defer writer.Stop()
	spinner1, _ := createSpinner1(writer)
	spinner2, _ := createSpinner2(writer2)
	spinner1.Start()
	time.Sleep(2 * time.Second)
	// update message
	spinner1.Message("uploading files")
	time.Sleep(2 * time.Second)
	spinner2.Start()
	time.Sleep(2 * time.Second)
	spinner1.Message("test")
	time.Sleep(2 * time.Second)
	spinner2.Stop()
	spinner1.Stop()
}

func createSpinner1(writer io.Writer) (*yacspin.Spinner, error) {
	// build the configuration, each field is documented
	cfg := yacspin.Config{
		Prefix:            "s1",
		Writer:            writer,
		Frequency:         100 * time.Millisecond,
		CharSet:           yacspin.CharSets[11],
		Suffix:            " ", // puts a least one space between the animating spinner and the Message
		Message:           "collecting files",
		SuffixAutoColon:   true,
		ColorAll:          true,
		Colors:            []string{"fgYellow"},
		StopCharacter:     "✓",
		StopColors:        []string{"fgGreen"},
		StopMessage:       "done",
		StopFailCharacter: "✗",
		StopFailColors:    []string{"fgRed"},
		StopFailMessage:   "failed",
	}

	s, err := yacspin.New(cfg)
	if err != nil {
		return nil, fmt.Errorf("failed to make spinner from struct: %w", err)
	}

	return s, nil
}
func createSpinner2(writer io.Writer) (*yacspin.Spinner, error) {
	// build the configuration, each field is documented
	cfg := yacspin.Config{
		Writer:            writer,
		Prefix:            "s2",
		Frequency:         100 * time.Millisecond,
		CharSet:           yacspin.CharSets[11],
		Suffix:            " ", // puts a least one space between the animating spinner and the Message
		Message:           "doing stuff",
		SuffixAutoColon:   true,
		ColorAll:          true,
		Colors:            []string{"fgYellow"},
		StopCharacter:     "✓",
		StopColors:        []string{"fgGreen"},
		StopMessage:       "done",
		StopFailCharacter: "✗",
		StopFailColors:    []string{"fgRed"},
		StopFailMessage:   "failed",
	}

	s, err := yacspin.New(cfg)
	if err != nil {
		return nil, fmt.Errorf("failed to make spinner from struct: %w", err)
	}

	return s, nil
}

I have absolutely no idea why this does not work as it should write to two different writers as in spinner.go in line 830 defined:

    if s.buffer.Len() > 0 {
		if _, err := s.writer.Write(s.buffer.Bytes()); err != nil {
			panic(fmt.Sprintf("failed to output buffer to writer: %v", err))
		}
	}

Could you please offer some assistance?

Thanks in advance.