Bad Arc internal interpretation (From DWG)

Hi,

I think FME does not treat some arc during transformation.

I have a polygon in a dwg containing a long arc:

What i see in acad:

What i see in FME Data inspector:

the main problem is that some function like spatial relator (IE: "Requestor is within supplier") don't see the circle in the polygon.

In acad, all my circle are inside other polygon, here is what spatial relator see, the highlighted circles are misinterpreted.

If i use a dwg writer to ouput data, the arc seems correct in acad

If i use a shape writer to ouput date, the arc is like the one in FME data inspector.

I attached the minimal workbench and dwg to this post.

Any hint?

David