Visible splits in lumen reflections(the rendered frame) when using large screenpercentage

Development Rendering
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Hi, Everyone. I noticed that if you settting r.ScreenPercentage to a very large value(in my case 200), and you enabled Lumen reflections and hardware raytracing, there will be visible split lines across the rendered frame. More informations:

  1. The display resolutions is 4k(3840x2160)
  2. I also use DLSS in my project
  3. Engine version 5.4.4
  4. If disable lumen reflection with r.Lumen.Reflections.Allow=0, the rendered frame became normal even if r.ScreenPercentage=200
  5. Different screen percentage settings will cause different split pattern. For r.ScreenPercentage=200, the split line is in the middle of the width and height of the rendered frame

So how can I resolve this problem. Or is there some restrictions about the Lumen Reflections(Like some GPU buffer size or render target size).
Many thanks!!!