Quest 3S v2.5 update broke WebXR/WebGL: render init fails in Browser (regression)

Question

Hello,

I am reporting a regression introduced by the July 8, 2026 software update

on Meta Quest 3S (OS v2.5, build 3594280027800610).

Summary:

A WebXR streaming web application (NVIDIA CloudXR.js web client, WebGL-based)

that had worked reliably for several weeks now fails immediately when

connecting, with the error:

failed to create CloudXR session: Error: Failed to initialize WebCL render

The failure occurs during the client's local render-context initialization,

before any network session is attempted (confirmed: the streaming server

receives no connection attempt).

Evidence that this is a headset-side regression:

- The same URLs work correctly in desktop Chrome on the same network,

so the server stack is healthy.

- The app worked on this same headset until the July 8 update.

- Tried on the headset: private tab, full reboot, clearing browser data —

same failure. Wolvic on the same headset also fails, which may point to

an OS-level graphics/WebXR runtime change rather than the browser alone.

Questions:

1. Did the v2.5 update change WebGL/WebXR context creation behavior?

2. Is there a rollback option or an ETA for a fix?

This blocks an active university robotics research project (VR teleoperation

data collection). Related public threads:

- NVIDIA forum: https://forums.developer.nvidia.com/t/376238

Thank you,

Jun

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