I'm rendering an animation (as an .exr image sequence) and some images have these tiles appear on the final render. It somehow only happens on surfaces that are closer to the camera. It looks like Blender is somehow calculating adjacent tiles differently in certain areas.
You can see them on this image as the faint, slightly darker squares. The distribution of these boxes in random every render-iteration.
Has anyone had the same problem? I've tried turning denoising off, changing the tile sizes, changing the sampling or changing the light paths etc., nothing helped.