Unity: Bodytracking accuracy

Hi,
I use the body tracking module in Unity and I noticed that the accuracy (e.g. of leg movements) is very poor at a distance of a few meters from the camera. In addition, people are often no longer detected at all, even if the distance is still < 10 meters and if I set the confidence very low.

Is the ZED2i and the unity plugin simply not designed for distances of more than a few meters? What do I have to consider when recording the SVOs in order to get better results (or the best possible results)?