Sequence timing issues: durations shorter than defined, slowing over time

[XOGamesHyoju]

DOTween version : 1.0.381

I'm using DOTween's Sequence to control a UI animation. However, the timing of the sequence does not behave as expected. It seem to be executed faster than the defined values at first, but then progressively slow down. The sequence does not respect the exact timing I set via AppendInterval or tween durations.

Below is my Sequence code. I also logged timestamps using Time.realtimeSinceStartup to verify the timings. The log outputs (attached as an image) show that the actual times deviate significantly from the expected durations.

Sequence seq = DOTween.Sequence();
        if (delay > 0)
        {
            Debug.Log("Start Seq | Delay: " + delay + " Time: " + Time.realtimeSinceStartup);
            seq.AppendInterval(delay);
        }
        seq.AppendCallback(() =>
        {
            Debug.Log($"Start Seq | [After Delay] Time Passed: {Time.realtimeSinceStartup - startUnscaled:F3}");
            startUnscaled = Time.realtimeSinceStartup;
            Debug.Log($"Start Seq | [After Delay] Time: {startUnscaled}");
            bannerImage.DOFade(1, 0.2f);
        });
        seq.Append(_bannerTrans.DOScaleX(1, 0.6f).SetEase(Ease.OutBack));
        seq.AppendCallback(() =>
      {
          Debug.Log($"Start Seq | [After 0.6f] Time Passed: {Time.realtimeSinceStartup - startUnscaled:F3}");
          startUnscaled = Time.realtimeSinceStartup;
          Debug.Log($"Start Seq | [After Delay] Time: {startUnscaled}");

      });
        seq.AppendInterval(0.2f);
        seq.AppendCallback(() =>
      {
          Debug.Log($"Start Seq | [After 0.2f] Time Passed: {Time.realtimeSinceStartup - startUnscaled:F3}");
          startUnscaled = Time.realtimeSinceStartup;
          Debug.Log($"Start Seq | [After Delay] Time: {startUnscaled}");

      });
        seq.Append(_titleTextTrans.DOScale(1.3f, 0.3f)).SetEase(Ease.OutQuart);
        seq.Join(_titleTextTrans.DOLocalMoveY(_textOriY, 0.3f).SetEase(Ease.OutBack));
        seq.AppendCallback(() =>
   {
       Debug.Log($"Start Seq | [After 0.3f] Time Passed: {Time.realtimeSinceStartup - startUnscaled:F3}");
       startUnscaled = Time.realtimeSinceStartup;
       Debug.Log($"Start Seq | [After Delay] Time: {startUnscaled}");

   });
        seq.AppendInterval(0.2f);
        seq.Append(_titleTextTrans.DOScale(1f, 0.1f).SetEase(Ease.InOutSine));
        seq.AppendCallback(() =>
     {
         Debug.Log($"Start Seq | [After 0.3f] Time Passed: {Time.realtimeSinceStartup - startUnscaled:F3}");
         startUnscaled = Time.realtimeSinceStartup;
         Debug.Log($"Start Seq | [After Delay] Time: {startUnscaled}");

     });
        seq.AppendInterval(0.4f);
        seq.AppendCallback(() =>
      {
          Debug.Log($"Start Seq | [After 0.4f] Time Passed: {Time.realtimeSinceStartup - startUnscaled:F3}");
          startUnscaled = Time.realtimeSinceStartup;
          Debug.Log($"Start Seq | [After Delay] Time: {startUnscaled}");

      });
        seq.Append(_canvasGroup.DOFade(0, 0.1f));
        seq.AppendCallback(() =>
      {
          Debug.Log($"Start Seq | [After 0.1f] Time Passed: {Time.realtimeSinceStartup - startUnscaled:F3}");
          startUnscaled = Time.realtimeSinceStartup;
          Debug.Log($"Start Seq | [After Delay] Time: {startUnscaled}");

      });