Issues with mirror reflections

There is flickering shadow bubbles and texture defects only in my mirrors reflections, while the rest of the scene seems ok. All the resolution changes I make in the project settings change the entire scene except the reflections of the mirror.
This problem seems to be affecting a lot of people

I’m using the default settings of the architecture scene.
UE 5.5 version
Geforce RTX 2060 super
Global Illumination: Lumen
Reflections: Lumen


Things I’ve already try to fix this but didn’t work:

  • Try using the previous version UE (5.4)
  • Increase the resolution to Cinematic
  • Try using planar reflections
  • Update my video card driver
  • Reinstall Unreal Engine
  • Create a new project
  • Try with a different type of light
  • Fix the normals of the reflected objects and the mirror itself
  • Use the default UE shapes like a cube for the entire scene
  • Increase the screen percentage to 100% or more
  • Change the materials of the objects and the mirror
  • In GI, increase the “Final Gather Quality”
  • Increase the Lumen Reflections quality
  • Select the “High Quality Translucency Reflections”
  • Increase the Sample Per Pixel of the light
  • Increase the reflection bounces
  • Check “Hit Lighting for Reflections”
  • r.RayTracing.NormalBias 5
  • r.Raytracing.Shadows.EnableTwoSidedGeometry 0
  • r.Lumen.Reflections.MaxRayIntensity 3
  • r.Lumen.Reflections.HiResSurface 1

Had a similar problem, reinstalling nvidia drivers (with ddu) helped. 552.22 is the version that seems to work for me

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