How to fix TSR Ghosting / Wave Artifacts on Flashlight with Volumetric Fog?

Development Rendering
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When rotating or panning the camera, my flashlight (which uses Volumetric Scattering Intensity) produces noticeable wavy/ghosting artifacts in the fog.

As a temporary workaround, switching the Anti-Aliasing method from TSR to FXAA completely resolves the issue, but it degrades the visual quality and makes the image too blurry. Is there a way to eliminate these wave artifacts without reverting to FXAA?

What I have tried so far:

  1. Enabled the new Temporal Responsiveness output node inside the flashlight’s Light Function material.

  2. Configured the project settings and CVars in DefaultEngine.ini as follows (but the wave artifacts still persist):

r.VolumetricFog.GridPixelSize=4 r.VolumetricFog.GridSizeZ=128 r.VolumetricFog.HistoryWeight=0 r.VolumetricFog.HistoryMissSupersampling=1 r.VolumetricFog.TemporalReprojection=0 r.VolumetricFog.Jitter=0 r.TSR.History.R11G11B10=1 r.TSR.History.ScreenPercentage=100 r.TSR.Velocity.Weight=0 r.TSR.History.SampleCount=16 r.TSR.Velocity.SampleCount=2 r.TSR.RejectionAntiAliasingQuality=2 r.TSR.ShadingRejection.Flickering=0 r.TSR.ShadingRejection.ExposureOffset=0 r.TSR.ShadingRejection.Flickering.Luminance=0.5 r.TSR.ShadingRejection.Flickering.FrameRateCap=0 r.TSR.ShadingRejection.Flickering.Period=0 r.TSR.ShadingRejection.Flickering.MaxParralaxVelocity=0 r.Shadow.Virtual.ResolutionLodBiasLocal=-1 r.Velocity.TemporalResponsiveness.Supported=1