A little misalignment with refractive tool

In my last model ( https://sketchfab.com/models/b5b82087a6a0469ca66fff2dd446767b ) we can see a misalignment when we manipulate the object.
But when I remove his refraction , this phenomenon disappear. Do you think it is a bug or not ?

@stephomi correct me if i’m wrong. I think this is the expected behavior. The issue occurs because we use information from the previous frame to render the SSR effect.

Yes it’s a known issue.