Sudden Loss of Body Tracking & Crashes with Unity Movement SDK (Quest 3) since version 2.3 update

Hi everyone,

I am experiencing a critical issue with the Unity Movement SDK on the Meta Quest 3, and I've noticed a few other developers mentioning the exact same problem recently.

My project relies heavily on the Movement SDK, and it was working perfectly fine up until recently (around April 29th/30th). Suddenly, body tracking has completely stopped working.

Here are the specific symptoms and the troubleshooting steps I've already taken:

Persistent Crashes: The project now crashes consistently when hitting Play in the Unity Editor. It also crashes when I build and run it directly on the Quest 3.

Older Builds Failing: I initially thought I broke something during a project update, but when I tested older, previously stable builds that had perfectly working body tracking, they also failed.

My Setup:

Device: Meta Quest 3 (Version 2.3.1034)

Software: Meta Horizon Link (Version 201.0.0.73.547)

Because older, untouched builds are now failing, this strongly suggests a bug or breaking change introduced in a recent Meta Horizon Link or Quest OS update rather than an issue within Unity itself.

Is this a known issue currently being looked into by the Meta team? If anyone has found a temporary fix or workaround, please let me know. Any help is appreciated.

Many thanks!!