1. Switch to an avatar with an animation that is triggered when the _Stretch of the Physbone exceeds a certain threshold.
  2. The moment the avatar is loaded, the _Stretch behaves as if it were stretched to the maximum, and the animation is triggered.
  3. _Stretch reacted when the avatar teleported or returned from a specific pose, etc., and the avatar's posture suddenly changed and the physbone moved.
  4. In some cases, _Stretch reacted abnormally when the player was moving too fast or under the influence of Station.
The specific behavior is as follows
Before the update: If Immobile is 1, it did not extend regardless of the value of stretch motion
After the update: Stretch motion value is used regardless of Immobile value.