If a point is accidentally add to a mask path with keyframes in an effect and the point is deleted or undone, then the keyframe will act like a hold keyframe. This will cause the keyframe to no longer smoothly transition between the any keyframe that comes before it. If the keyframe with the error is deleted then the next keyframe in the sequence will acquire the same error. This will continue till all keyframes are deleted forced the user to completely restart.

Could this problem with extra points added and then deleted/undone be fixed. Or can a shortcut be added that would toggle “add point pen tool” to the mask tool. Like holding Shift, Alt, or Ctrl to toggle on/off the “add point pen tool”. It is very easy to accidentally miss click when trying to select one point on a mask and instead add an extra point directly next to the point you want to select.