Regression in Shared Spatial Anchors on UE 5.7.4 with Meta XR SDK 205

My reports

Submit feedback

Investigation titles and descriptions are summarized by AI from Meta based on reports submitted by developers

Investigating

Issue

1 report

Created 2 days ago

Add your report

Suggest an edit

Copy link

Category

Mixed Reality > Shared Spatial Anchors

Investigation summary

A regression issue occurs in Shared Spatial Anchors on Unreal Engine 5.7.4 with Meta XR SDK 205.0 and 201.0 using OVRPlugin backend on standalone Meta Quest. Specifically, the OculusXRGetSharedAnchorsFromGroupAsync function fails to return the shared anchor despite the runtime finding it (returnCode: 0, numSpacesFound: 1). The QueryMgr discards the results and completion callbacks, logging 'Ignoring unknown query results available event' and 'Request not in active anchor search requests map of size 0.' This happens because the async anchor search request is not registered in QueryMgr when QuerySpacesFound is processed, resulting in Blueprint receiving Success=false with an empty anchors array. This issue does not occur in UE 5.4 with older Meta XR integration, and the Epic Native OpenXR backend fails at the anchor sharing stage before the Get operation.