Position filter fails after some time and outputs Nan only

[JulesThuillier]

The VRT_PositionFilter outputs only Nan in GetPosition function after some time.
This might be related to multithreading, or simply an error in the algorithm.

transform.position assign attempt for 'Tag_Hand' is not valid. Input position is { NaN, NaN, NaN }.
UnityEngine.Transform:set_position(Vector3)
VRTracker.Manager.VRT_Tag:LateUpdate() (at Assets/VRTracker/Manager/Scripts/VRT_Tag.cs:148)