The last AudioTrack will be abnormally truncated.

• I have tried with the newest version of editly: npm i -g editly or npm i editly@latest
• I have tried ffmpeg newest stable version
• I have searched for existing issues

When I splice multiple audio segments into an AudioTrack, the last segment is always unexpectedly cut off by one or two seconds. I have turned off the transition. And the sound has a slight misalignment(about 1 frame). Here is the comparative sound wave:

The render spec is below:

{
  outPath: 'output/voiceAndSub.mov',
  customOutputArgs: [ '-c:v', 'qtrle', '-pix_fmt', 'argb' ],
  audioTracks: [
    {
      path: '/var/folders/x0/q7x4m1vs2gnch_x92nqhr43c0000gn/T/tmp-17635-lfdSwRXgpwuH-.mp3',
      start: 0,
      mixVolume: 1
    },
    {
      path: '/var/folders/x0/q7x4m1vs2gnch_x92nqhr43c0000gn/T/tmp-17635-kUlJwa8FeSA1-.mp3',
      start: 8.904,
      mixVolume: 1
    }
  ],
  clips: [
    {
      duration: 20,
      transition: { name: 'directional-left' },
      layers: [
        {
          type: 'title-background',
          text: 'EDITLY\nVideo editing framework',
          background: { type: 'linear-gradient', colors: [ '#02aab0', '#00cdac' ] }
        }
      ]
    }
  ],
  width: 1280,
  height: 720,
  fps: 30,
  defaults: { layer: { fontPath: 'assets/fonts/fzsong.ttf' }, transition: null }
}

Start by reproducing the render with the supplied audioTracks and clips specification, using the reported transition and ffmpeg setup. Compare the rendered waveform and timing against the two source segments; done means the final segment is not truncated and the roughly one-frame misalignment is resolved.