"Use improved segmented mask" not working

[Garin2-colab]

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Describe the bug
Even when I use "Use improved segmented mask" under Post-Processing&Advanced Mask Options, I still see square fomat of replacement. Even in your Einstein example of Advance option, I see square format of mask instead of face only.

To Reproduce
Steps to reproduce the behavior:

1. I go to Post-Processing&Advanced Mask Options
2. Turn on 'Use imporved segmented mask'
3. Render and compare the original
4. See error

Expected behavior
Hair shouldn't be affected by the Faceswap. Only face should be replaced.

Screenshots

Desktop (please complete the following information):

• OS: Windows 11
• Browser chrome
• Version v1.6.1