Hey there @JaviM23! Welcome to the community! This looks a bit like temporal ghosting stemming from Lumen, assuming you have it enabled. This is an unfortunate side-effect of Lumen interacting with a temporal anti aliasing method. This thread goes over some possible fixes aside from disabling lumen or changing to another AA method. This includes the command r.Lumen.ScreenProbeGather.ScreenTraces 0, though they were mostly leaning towards real time instead of rendered so you may see different outcomes.
Hope this helps!