I don’t have a Vectric tool path, that was just a comment, sorry.
My 1/4 tool is defined under a category I created. Just a simple endmill 1/4". I’ve selected this on many 2.5d projects.
I haven’t selected a 3d tool from the Carbide menu for this or any other projects. Are you thinking the random plunge could have been programed because of my manually created bit?