Windows Mixed Reality HMD shutter lag after 5.2 Update

Development Platform & Builds XR Development
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I reproduce this issue on this configuration:

  • UE 5.4.4
  • Windows 11 Pro 23H2 22631.4890
  • RTX 4090
  • HP Reverb G2
  • WMR as active OpenXR runtime

I also confirm that switching to SteamVR as active openxr runtime has completely solved the stuttering I was experiencing. It seemed the stuttering was due to something breaking the motion reprojection that should be happening normally; when rendering at 75hz (what the headset seemed to be presenting to instead of 90hz), only the frame drops below that would introduce a stutter. Unable to say about latency in particular.

This was not a problem in UE4.27.2, and was most likely not a problem in UE5.1.