Problem: mocha pro remove with Interpolate

[da00oha]

hi everyone.
I have issue like this picture:

I roto mask out the characters in the foreground, and I crate Cleanplate in Frame 85, it looks good:

but not every frame is ok.
I like interpolate colors is match my footage, linear can fix this issue, but color is not right.
how can I do to fix this?

thank you.

[da00oha]

Hi, me again.
I may have found the problem,
masks cannot have feathering

Hope this helps someone with the same problem.

[maryp]

Yes, pixels from the foreground woman are contaminating the lighting interpolation. Exactly.