Hi there,
I'd like to point out that the contour and pad modifiers seem to have lost their functionality in-between v2017sp1 and v2018sp2.
Specifically, in 2018 the terrain mesh does not properly deform to match the contour modifier. This does not happen for every contour, only for some and apparently random ones.
For my peace of mind I have exported the problematic file to 2017 and updated the site model and the problem is fixed (Please see attached screen-shots from the two files)
Could someone please address / confirm this issue?
PS: I am working on a Mac if that is relevant.