VR ，Fabrik make use of the hand to follow the movement of the handle, but hand shake?

Development Platform & Builds XR Development
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1

It is a stationary upper body animation.
Each tick Get L’Motion Controller position
Guess is due to the bones move and L’Motion Controller to move the location of the presence of bias. But it can not be determined.
Who can help me？

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2

use component space.