Lightmix Rest (unassigned) pass not denoised

[Bormax]

Hi
Have a problem with lightmix Rest (unassigned) pass and denosing. This pass comes automatically and doesn't have option to be or not to be denoised. From Max I can't even see this element, it's visible in CIE. The problem is that this pass not included to denoising and makes the whole picture from Lightmix noisy.
Is it a bug or I do something wrong?

[maru]

Already on mantis: https://corona-renderer.com/bugs/view.php?id=2737
Also, similar, denoising alpha channel: https://corona-renderer.com/bugs/view.php?id=2492