[UE6 main] LumenRef fails in recent build

Summary

reproducible on clean build,
When trying to visualize LumenRef I get the error message
Current RHI does not support Shader Execution Reordering

Running D3D12 and SM6 on RTX A5000

What Type of Bug are you experiencing?

Rendering (Graphics / Niagara)

Steps to Reproduce

r.LumenRef.Visualize 1 after LumenRef is enabled

Expected Result

should work without errors

Observed Result

LumenRef no longer works in same hardware. Worked fine in previous build.

Affects Versions

6

Platform(s)

Windows

Environment
Threadripper 1950X, 64GB RAM, RTX A5000, D3D12 RHI, Windows 10, engine built via command-line Build.bat (not full VS solution build), current tip of ue6-main at time of report.

Note
LumenRef was working fine in earlier builds, exact same hardware

Question - is there now a hard dependency on more recent GPUs supporting SER and or SM6.9 for LumenRef to work?

I’m getting the same error with an RTX 3090. Unfortunately only RTX 4000 series and up support Shader Execution Reordering (SER).