Body Tracking & Simultaneous Hands+Controllers — Bug or Intended Functionality?

Hi everyone,

I’ve run into something strange and I’m not sure if it’s a bug or a hidden feature, so I thought I’d ask here.

I’m working on a project using Unity 6 (6000.0.44f1) with the Meta XR All-in-One SDK (74.0.3) and the Meta Movement SDK (74.0.0). I’m trying to get body tracking to work together with Simultaneous Hands and Controllers for my avatar.

Here’s the issue:

• When I enable "Simultaneous Hands and Controllers" in the Inspector, body tracking stops working.

• But if I:

  1. Enable "Simultaneous Hands and Controllers"

  2. Then enable "Launch Simultaneous Hands and Controllers Mode"

  3. Then go back and disable "Simultaneous Hands and Controllers"

The "Launch Simultaneous Hands and Controllers Mode" stays active, and everything works! Body tracking, hands, and controller tracking all function well together in the editor/play mode.

However, when I make a build, body tracking stops working again, even though I followed the same sequence.

I honestly stumbled upon this by accident while trying different combinations to get both systems working together. It feels like a workaround, not a real solution.

I'm attaching a Google Drive link with a video showing what I mean (my explanation might be confusing, so the video should help): Video Here 

Has anyone else encountered this? Is this behavior intended? And more importantly, is there any way to get this working in a build, not just in the editor?

Thanks in advance!