Match average leaves gaps between surfaces

Hi,
It works properly here with

Version 8 SR4
(8.4.24023.15001, 2024-01-23)

Even after you press OK? The preview looks as expected for me as well, but the result only affects the first surface, not the second.

I’m on the same version too.

Yes the preview shows the final result fortunately.

Might me something related to history? did you try with the file you are sharing here?