Artefact Problem on rendering

Hi everybody,

I’m rendering an animation for a complex archviz scene.
The problem is when i do the render i have some strange artifact appearing in the shadows.
I’m using raytracing with a 2080ti and the movie Render Queue to render (same effect if i render in the movie sequencer).

I’ve tried different setup but none of them are able to make this disappear.

Does someone have a clue from where this is coming from?
image attached.

That’s noise from ray tracing samples