Magic Mask flickering

I'm using Magic Mask to separate a subject from the background and grade only the subject in DaVinci Resolve Studio 17. However, there is a flickering at some borders of the subject. I tried fine-tuning all the different settings like Radius, Smart Refine, Iterations, etc. but the issue persists. Also tried moving the markers manually frame-by-frame but no luck

Has anyone else encountered similar issues and have any suggestions on how this issue can be resolved?

Thanks!

This can happen, depending on image content. It's no replacement for a proper green screen.

Hey,

This is one of the main reasons MM should be available in Fusion...
This flickering may comes from noise on the FG, try denoising first (which anyway would not be as good as what could be done with a matte control etc etc)