How to prevent two polygons from merging as same soil/material in python API? Seems that when you add a different polygon on top of an already existing polygon, Plaxis automatically assigns a soil material of the polygon underneath?

Question

As further description to the title, it seems in the python API when you add a polygon on top of an already existing soil polygon, when you run a gotostages or gotoflows function, the soil/material assigned to the smaller polygon (yellow below) in the staged construction window has had a soil material automatically overridden? Is this an expected result when working in the API and is there anyway we can get around this? 
 
 Structures View

Staged construction view

Stefanos Papavasileiou · Answer

Hello Tom, 
 The material assigned to a soil layer created by a borehole takes precedence. 
 The moment you switch to Staged construction, intersection takes place. Then PLAXIS needs to make sure that all created new objects (here polygons) have all properties assigned. 
 Naturally in conflicts, a choice has to be made. In this case, for the materials of polygons the configured soil layer will "win" over any polygon created in Structures mode.