too many lines in elevation!

[mest79]

Hi!
I have a problem when creating objects with Archicad 17

When I create an object starting from walls and floors and after save it as an object.
Well.
With archicad 17, in elevation, there are the connection lines between the 3D elements that I used to create the object.

Why?

With archicad 15 or 12 that it had never happened.

Thanks!

[mest79]

in the zip file attach 2 gsm, the same object made with AC17 and AC15