Reflections appearing dark at certain angles

I’m using Hardware Ray tracing turned on, in the latest UE 5.5.4

Here are the SS for Project Settings :-

and yes it seems like SSR issue but with hardware ray tracing i thought it would eliminate the issue of SSR, as by turning Screen Traces ON and OFF the fading goes away but then i also lose the reflection details which are available on screen :-

Screen traces turned ON :

Screen traces turned OFF :

These are the settings in Post Process Volume, as we can see that it is running on Lumen for GI and Reflections and raster for Translucency but still i get these fading and it is not only on curtains it also happens on everything like ceiling and shadows on the wall edges there are some strong shadows which goes away if i start looking at that particular angle.

and this is the Lumen overview :-

The curtains are geometry cache in blueprint rather than mesh and can’t edit them as I’ve downloaded them to get animated curtains.