Mask moves when deleting keyframes

What is your operating system? Windows 10

What is your Shotcut version 21.02.27

Can you repeat the problem? If so, what are the steps?

  1. Add Mask: Simple Shape to a clip.
  2. Add Horizontal and/or Vertical keyframes.
  3. Delete the keyframes:
    The mask moves to the far left side of the screen and/or to the top of the screen.
  4. Adjust the H & V position even a little and the mask returns to the center.

It could be a known bug, because someone told me he sees the same behavior on his Mac, using an older version of Shotcut.

I always set the 1st frame of the keyframe to a value.

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Oui, je peux confirmer que ce bug existait déjà sur les anciennes version (v20.09;27) même si on règle les valeurs de la première valeur.
L’image se décale à horizontal = 0 et vertical = 0 alors que les sliders dans l’UI restent à leurs valeurs.

Yes, I can confirm that this bug already existed on the old versions (v20.09;27) even if you set the values of the first keyframe.
The image shifts to horizontal = 0 and vertical = 0 while the sliders in the UI remain at their values.

Deleting all the keyframes is unexpected. I made a change for the next release that does not allow deleting the last keyframe.