Different workplane origin position after cut solid and after cutBlind

Hello,

I am trying to cut some figure from base figure horizontally and then make some drawings on a vertical surface of the same base figure and I have noted, that when I take vertical workplane of the solid, horizontal position of the center is different, depending on how I have made a cut - either with cutBlind or cutting extruded solid of the same shape.

My simplified code:
~~~python
box1 = (
cq.Workplane("XY")
.rect(6, 10, centered=(False, True))
.extrude(4)
)

box1_cutBlind = (
box1.faces("Z").workplane()
.rect(4, 3, centered=(False, True))
)

#show_object(box1_cutBlind)
#show_object(box1_cutSolid)
show_object(box1)
#show_object(box2_v1)
show_object(box2_v2)
~~~

box1: either box1_cutBlind and box1_cutSolid visually give the same result. "offset" param tunes horizontal position of the cut solid. Then box2_v2 draws a rectangle on the top face of the original box1, one of the edges of the rect is placed on the 0 position of X.

So, tuning 'offset' param would move horizontal position of the cut solid on axes X. With box1_cutBlind this would also move topmost rectangle along the X axes. With box1_cutSolid option the topmost rectangle would always stay on the 0 position on axes X.