The issue where the tool paths causing the bit to skim the surface of a plane at that plane’s height has been raised several times. Recently it has been showing itself more I do believe. Several weeks ago, I mentioned the exact same issue because the machine was doing rapids at the exact height of an already milled section, and it was causing me to have mini-heart-attacks because it was in aluminum. With the machine tolerances what they are any travel across a plane should be, at minimum, that plane’s height plus the safety height in my opinion. It was stated, at least at that time, that the development team is aware and working on the issue.
{:0)
Brandon Parker