Avatar collapse on the floor

Hello I'm new to Unity and also new to VR developpment.

I have been facing an issue with the meta movement SDK and the Avatar i'm using to follow the movement tracking.

I looked up in the documentation and find a troubleshooting saying that when the avatar is collapsing on the floor it is because the tracking of the controller or hand is lost.

Is there a way to avoid that?

I've been trying the samples of the meta movement SDK and I faced the same issue.

I'm using the building block for the camera rig and tracking and for the avatar it has an OVR Body component and an Character Retargeter.

In hope anybody can help !