Horizon OS v2.4 breaks hand far-interaction in all OpenXR Unity apps
Posting here to surface a regression that's affecting our production app
on the Meta Horizon Store and appears to be hitting the broader OpenXR
ecosystem on Quest 3.
SUMMARY
Since Horizon OS v2.4 rolled out (week of 18 May 2026), the Meta Aim
Hand OpenXR extension (XR_FB_hand_tracking_aim) returns a stuck/invalid
aim pose. Any Unity app reading pose from the MetaAimHand input device
(via com.unity.xr.hands) loses hand far-interaction: the ray is stuck
pointing forward, and the grab interaction range tied to the ray is
also affected. Reproduces in the Unity Hub VR template project as well
as in our production apps
WHAT'S RULED OUT
- System-level hand tracking is healthy: works in Quest Home, 2D system
apps, and via XR_EXT_hand_tracking joint data inside the app itself
(near interaction with hands continues to work).
- Our MRTK-based sister app, which derives its hand ray from joints
rather than from the Aim extension, is unaffected — confirming the
breakage is scoped specifically to XR_FB_hand_tracking_aim.
- The latest Meta XR Core SDK / Interaction SDK (v201.0, April 15) and
Unity's com.unity.xr.hands (1.6.0-pre.3) and com.unity.xr.meta-openxr
(2.6.0-pre.1) all predate the v2.4 rollout — no upstream SDK fix
available to update to.
- The Hand Interaction Profile workaround restores a ray but with pinch
detection too sensitive for production use, which makes it unviable
for medical/clinical content.
VIABLE MITIGATIONS FOR SHIPPING APPS
Falling back to controllers, or computing a custom aim pose from
XR_EXT_hand_tracking joints directly (bypassing MetaAimHand entirely).
ALSO REPORTED
- Unity Discussions: https://discussions.unity.com/t/quest-3-openxr-hand-tracking-no-longer-works-after-2-4-update/1721513
- Filed on Meta Feedback Center (Inputs → Hand Tracking) for engineering
tracking.
ASK
Confirmation this is on Meta's radar, ETA on a Horizon OS hotfix or an
SDK-level workaround, and any guidance for affected apps shipping
today. Happy to provide additional repro details or logs (privately) if
useful.
